Gr 10 Review sheet chemistry
... Coefficients apply to all atoms in the compound. Subscripts apply only to the element that they follow. Exception – if the subscript follows a bracket “)”, it is applied to all elements in the bracket. Ex. For calcium nitrate 2Ca(NO3)2 The coefficient (2) applies to all elements: Therefore, 2 Ca ...
... Coefficients apply to all atoms in the compound. Subscripts apply only to the element that they follow. Exception – if the subscript follows a bracket “)”, it is applied to all elements in the bracket. Ex. For calcium nitrate 2Ca(NO3)2 The coefficient (2) applies to all elements: Therefore, 2 Ca ...
File
... Some atomic masses may be written as a decimal (e.g. Carbon is actually 12.01, not ‘12’) This is because some elements have atoms with varying numbers of neutrons in the nucleus. ...
... Some atomic masses may be written as a decimal (e.g. Carbon is actually 12.01, not ‘12’) This is because some elements have atoms with varying numbers of neutrons in the nucleus. ...
atomic number
... • They are made up of three types of particles – Proton - a positively charged particle – Neutron - a neutral particle – Electron - a negatively charged particle (much lighter than a Proton or Neutron) ...
... • They are made up of three types of particles – Proton - a positively charged particle – Neutron - a neutral particle – Electron - a negatively charged particle (much lighter than a Proton or Neutron) ...
No Slide Title
... • They are made up of three types of particles – Proton - a positively charged particle – Neutron - a neutral particle – Electron - a negatively charged particle (much lighter than a Proton or Neutron) ...
... • They are made up of three types of particles – Proton - a positively charged particle – Neutron - a neutral particle – Electron - a negatively charged particle (much lighter than a Proton or Neutron) ...
Pre-Knowledge: Chemistry and Physics Vocabulary Atomic Number
... The sum of the number of neutrons and protons in the nucleus of an atom. Nucleus The small “core” of the atom, where most of its mass and all of its positive charge is concentrated. Except for ordinary hydrogen (which has only a proton), atomic nuclei consist of protons and neutrons. For this reason ...
... The sum of the number of neutrons and protons in the nucleus of an atom. Nucleus The small “core” of the atom, where most of its mass and all of its positive charge is concentrated. Except for ordinary hydrogen (which has only a proton), atomic nuclei consist of protons and neutrons. For this reason ...
Chemistry Study Guide
... react with other forms of matter. For example, some substances are flammable. If they are heated with oxygen, they will react and burst into flames. The ability of a substance to combine with oxygen is an example of chemical property. ...
... react with other forms of matter. For example, some substances are flammable. If they are heated with oxygen, they will react and burst into flames. The ability of a substance to combine with oxygen is an example of chemical property. ...
Chemistry Study Guide
... react with other forms of matter. For example, some substances are flammable. If they are heated with oxygen, they will react and burst into flames. The ability of a substance to combine with oxygen is an example of chemical property. ...
... react with other forms of matter. For example, some substances are flammable. If they are heated with oxygen, they will react and burst into flames. The ability of a substance to combine with oxygen is an example of chemical property. ...
CHEMISTRY The Molecular Science
... Dalton’s Atomic Theory • An element is composed of tiny particles called atoms. All atoms of a given element show the same chemical properties. • Atoms of different elements have different properties. • Compounds are formed when atoms of two or more elements combine. In a given compound, the relati ...
... Dalton’s Atomic Theory • An element is composed of tiny particles called atoms. All atoms of a given element show the same chemical properties. • Atoms of different elements have different properties. • Compounds are formed when atoms of two or more elements combine. In a given compound, the relati ...
atomic number
... • They are made up of three types of particles – Proton - a positively charged particle – Neutron - a neutral particle – Electron - a negatively charged particle (much lighter than a Proton or Neutron) ...
... • They are made up of three types of particles – Proton - a positively charged particle – Neutron - a neutral particle – Electron - a negatively charged particle (much lighter than a Proton or Neutron) ...
Extra Credit Test Review
... 11.How would you write a lithium atom isotope with 5 neutrons? ___________ 12.One atom has 17 protons, 18 neutrons, and 17 electrons. Another atom has 17 protons, 19 neutrons and 17 electrons. Are these the same element? Yes No Explain: _______________________________________________________________ ...
... 11.How would you write a lithium atom isotope with 5 neutrons? ___________ 12.One atom has 17 protons, 18 neutrons, and 17 electrons. Another atom has 17 protons, 19 neutrons and 17 electrons. Are these the same element? Yes No Explain: _______________________________________________________________ ...
Atomic History Notes.notebook
... Dalton devised an atomic theory (early 1800's) based on the following points: 1) Elements are composed of extremely small and indivisible particles called atoms. 2) Atoms of the same element are identical. 3) Atoms combine chemically in simple whole number ratios, H2O is a 2:1 ratio of hydrogen and ...
... Dalton devised an atomic theory (early 1800's) based on the following points: 1) Elements are composed of extremely small and indivisible particles called atoms. 2) Atoms of the same element are identical. 3) Atoms combine chemically in simple whole number ratios, H2O is a 2:1 ratio of hydrogen and ...
File
... would be completely filled by a neutral atom of calcium? How many electrons would be left over? ...
... would be completely filled by a neutral atom of calcium? How many electrons would be left over? ...
Chapter 4.1 Notes
... - suggested universe was made of indivisible units called atomos – means unable to be cut or divided - did not have any evidence - forgotten until 1700’s ...
... - suggested universe was made of indivisible units called atomos – means unable to be cut or divided - did not have any evidence - forgotten until 1700’s ...
The Periodic Table
... number is the total number of nucleons (the protons and neutrons) in the nucleus. ...
... number is the total number of nucleons (the protons and neutrons) in the nucleus. ...
The Atom - Williamstown Independent Schools
... proportions regardless of sample size or source. ...
... proportions regardless of sample size or source. ...
What does an elements atomic mass tell us about the element?
... Potassium - K Atomic # = 19 Mass # = 39 K nucleus contains 19 protons 39 – 19 = 20 neutrons How many electrons? Same as # Protons (19) ...
... Potassium - K Atomic # = 19 Mass # = 39 K nucleus contains 19 protons 39 – 19 = 20 neutrons How many electrons? Same as # Protons (19) ...
Metals
... “elements”: air, fire, water, and earth. People believed this for many centuries! • In the late 1600s, early chemists began to discover that this was not the case, that there are more than 4 elements and they are not what the Greeks thought they were. • Now we know that all matter in the universe is ...
... “elements”: air, fire, water, and earth. People believed this for many centuries! • In the late 1600s, early chemists began to discover that this was not the case, that there are more than 4 elements and they are not what the Greeks thought they were. • Now we know that all matter in the universe is ...
Ch. 4: Atoms and the Periodic Table – Study Guide
... The first person who suggested that matter was made up of atoms was the Greek philosopher Democritus. The word atom comes from the Greek word that means “unable to be divided.” Dalton’s atomic theory stated that every element was made of atoms that could not be subdivided, atoms of the same element ...
... The first person who suggested that matter was made up of atoms was the Greek philosopher Democritus. The word atom comes from the Greek word that means “unable to be divided.” Dalton’s atomic theory stated that every element was made of atoms that could not be subdivided, atoms of the same element ...
Periodic Table
... isotopes.The lighter isotope (Cu-63), with 29 protons and 34 neutrons, makes up 69.17% of copper atoms.The heavier isotope (Cu-65), with 29 protons and 36 neutrons, constitutes the remaining 30.83% of copper atoms. Calculate the atomic mass of Copper. ...
... isotopes.The lighter isotope (Cu-63), with 29 protons and 34 neutrons, makes up 69.17% of copper atoms.The heavier isotope (Cu-65), with 29 protons and 36 neutrons, constitutes the remaining 30.83% of copper atoms. Calculate the atomic mass of Copper. ...
Introduction to the Periodic Table
... Atomic number – number of protons and electrons (number at top of box) Atomic mass – number of protons and neutrons added together (number at bottom of box) ...
... Atomic number – number of protons and electrons (number at top of box) Atomic mass – number of protons and neutrons added together (number at bottom of box) ...
Test 2 Review Test 2 Review (15-16)_2
... (14) ____________ Which column from above contains the alkaline earth metals? (15) ____________ Which column from above contains the Noble Gases? (16) ____________ Which column from above contains the most reactive non-metals? (17) ____________ Which column from above contains VERY non-reactive elem ...
... (14) ____________ Which column from above contains the alkaline earth metals? (15) ____________ Which column from above contains the Noble Gases? (16) ____________ Which column from above contains the most reactive non-metals? (17) ____________ Which column from above contains VERY non-reactive elem ...
17 review for test - Blair Community Schools
... • What is the central core of atom called? • Compare the masses of protons, neutrons, and electrons • Know where groups and periods are • How many electrons are in the 2nd E-level • How are C-12 and C-14 different? ...
... • What is the central core of atom called? • Compare the masses of protons, neutrons, and electrons • Know where groups and periods are • How many electrons are in the 2nd E-level • How are C-12 and C-14 different? ...
Chemical element
A chemical element (or element) is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements. There are 80 elements that have at least one stable isotope and 38 that have exclusively radioactive isotopes, which decay over time into other elements. Iron is the most abundant element (by mass) making up the Earth, while oxygen is the most common element in the crust of the earth.Chemical elements constitute approximately 15% of the matter in the universe: the remainder is dark matter, the composition of it is unknown, but it is not composed of chemical elements.The two lightest elements, hydrogen and helium were mostly formed in the Big Bang and are the most common elements in the universe. The next three elements (lithium, beryllium and boron) were formed mostly by cosmic ray spallation, and are thus more rare than those that follow. Formation of elements with from six to twenty six protons occurred and continues to occur in main sequence stars via stellar nucleosynthesis. The high abundance of oxygen, silicon, and iron on Earth reflects their common production in such stars. Elements with greater than twenty six protons are formed by supernova nucleosynthesis in supernovae, which, when they explode, blast these elements far into space as planetary nebulae, where they may become incorporated into planets when they are formed.When different elements are chemically combined, with the atoms held together by chemical bonds, they form chemical compounds. Only a minority of elements are found uncombined as relatively pure minerals. Among the more common of such ""native elements"" are copper, silver, gold, carbon (as coal, graphite, or diamonds), and sulfur. All but a few of the most inert elements, such as noble gases and noble metals, are usually found on Earth in chemically combined form, as chemical compounds. While about 32 of the chemical elements occur on Earth in native uncombined forms, most of these occur as mixtures. For example, atmospheric air is primarily a mixture of nitrogen, oxygen, and argon, and native solid elements occur in alloys, such as that of iron and nickel.The history of the discovery and use of the elements began with primitive human societies that found native elements like carbon, sulfur, copper and gold. Later civilizations extracted elemental copper, tin, lead and iron from their ores by smelting, using charcoal. Alchemists and chemists subsequently identified many more, with almost all of the naturally-occurring elements becoming known by 1900. The properties of the chemical elements are summarized on the periodic table, which organizes the elements by increasing atomic number into rows (""periods"") in which the columns (""groups"") share recurring (""periodic"") physical and chemical properties. Save for unstable radioactive elements with short half-lives, all of the elements are available industrially, most of them in high degrees of purity.