Matter Unit KUD
... Understand: 1. The atomic model is used to describe what an atom is made of and how it acts with other atoms. 2. In the atomic model protons and neutrons are found in the nucleus; electrons are found in a cloud outside the nucleus. 3. Atoms of any element are alike. Atoms of different elements are d ...
... Understand: 1. The atomic model is used to describe what an atom is made of and how it acts with other atoms. 2. In the atomic model protons and neutrons are found in the nucleus; electrons are found in a cloud outside the nucleus. 3. Atoms of any element are alike. Atoms of different elements are d ...
The Periodic Table of Elements
... – Because the bulk of the atoms mass is provided by the protons and neutrons, we only consider their masses when calculating the atomic mass #. ...
... – Because the bulk of the atoms mass is provided by the protons and neutrons, we only consider their masses when calculating the atomic mass #. ...
The parts of Dalton`s theory Matter is composed of small, chemically
... Example: Helium has an atomic number of 2. Every helium atom has two protons in its nucleus. - MASS NUMBER: The number of protons PLUS the number of neutrons in the atomic nucleus, Atoms of the same element may have DIFFERENT mass numbers. - ISOTOPES: are atoms of the same element with different mas ...
... Example: Helium has an atomic number of 2. Every helium atom has two protons in its nucleus. - MASS NUMBER: The number of protons PLUS the number of neutrons in the atomic nucleus, Atoms of the same element may have DIFFERENT mass numbers. - ISOTOPES: are atoms of the same element with different mas ...
are made up of
... Severalscientists,including Newlands, Meyer, and Mendeleevworked on classificationsystems that grouped elements accordingto their properties. They found that these properties repeated in a regular or periodic manner. This fact was used to predict properties of undiscovered elements. Reviewelectron a ...
... Severalscientists,including Newlands, Meyer, and Mendeleevworked on classificationsystems that grouped elements accordingto their properties. They found that these properties repeated in a regular or periodic manner. This fact was used to predict properties of undiscovered elements. Reviewelectron a ...
Matter
... A mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out. Particles are insoluble, so they DO NOT dissolve in the liquid or gas. Particles can be separated using a filter. ...
... A mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out. Particles are insoluble, so they DO NOT dissolve in the liquid or gas. Particles can be separated using a filter. ...
Integrated Science 3
... 19. What is true about the element immediately below the element that has an atomic number 17 in the periodic table. a) 17 electrons in its outer most level c) 17 protons in nucleus b) 7 electrons in its outermost level d) 7 protons in its nucleus 20. Two atoms that are isotopes have the same number ...
... 19. What is true about the element immediately below the element that has an atomic number 17 in the periodic table. a) 17 electrons in its outer most level c) 17 protons in nucleus b) 7 electrons in its outermost level d) 7 protons in its nucleus 20. Two atoms that are isotopes have the same number ...
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 ...
Elements Elements (cont.) Elements (cont.)
... • Atoms are indivisible by chemical processes. – All atoms present at beginning are present at the end. – Atoms are not created or destroyed, just rearranged in chemical reactions reactions. – Atoms of one element cannot change into atoms of another element. ...
... • Atoms are indivisible by chemical processes. – All atoms present at beginning are present at the end. – Atoms are not created or destroyed, just rearranged in chemical reactions reactions. – Atoms of one element cannot change into atoms of another element. ...
key - Greenslime.info
... The elements in group 17, including fluorine, bromine, chlorine and iodine, are called the halogens. Describe the reactivity of the halogens, and why they have this reactivity. The halogens are very reactive, because they each have seven valence electrons, and only need to gain one valence electron ...
... The elements in group 17, including fluorine, bromine, chlorine and iodine, are called the halogens. Describe the reactivity of the halogens, and why they have this reactivity. The halogens are very reactive, because they each have seven valence electrons, and only need to gain one valence electron ...
Power point on the Periodic Table
... Number of protons that an atom of any element has is called the atomic number The sum of the protons and neutrons is called the mass number Protons and neutrons make up nearly all the mass of an atom ...
... Number of protons that an atom of any element has is called the atomic number The sum of the protons and neutrons is called the mass number Protons and neutrons make up nearly all the mass of an atom ...
AP Chapter 2 Objectives
... Give the approximate size, relative mass, and charge of an atom, proton, neutron, and electron Distinguish between physical and chemical properties and also physical and chemical changes. ...
... Give the approximate size, relative mass, and charge of an atom, proton, neutron, and electron Distinguish between physical and chemical properties and also physical and chemical changes. ...
The Atom
... Mass can vary from 10 to 14 Average is mass of 12- all others are isotopes Can get mass with decimal – but can’t get a partial proton or neutron! Sample Problems An elements has 35 protons and 47 neutrons; a second element has 34 protons and 47 neutrons. Are they isotopes or different elements? Diff ...
... Mass can vary from 10 to 14 Average is mass of 12- all others are isotopes Can get mass with decimal – but can’t get a partial proton or neutron! Sample Problems An elements has 35 protons and 47 neutrons; a second element has 34 protons and 47 neutrons. Are they isotopes or different elements? Diff ...
chapter2 - AlvarezHChem
... • Isotopes are two atoms of the same element • Same atomic number but differ in number of neutrons • Different mass numbers • Mass # = p+ + n0 ...
... • Isotopes are two atoms of the same element • Same atomic number but differ in number of neutrons • Different mass numbers • Mass # = p+ + n0 ...
File
... 32. Give an example of a compound. H2O 33. What is a molecule? An element with more than one atom attached to it 34. Give an example of a molecule. O₂- air we breathe O₃- ozone layer 35. As you go from left to right on the periodic table, describe the changes that occur to element's atomic structure ...
... 32. Give an example of a compound. H2O 33. What is a molecule? An element with more than one atom attached to it 34. Give an example of a molecule. O₂- air we breathe O₃- ozone layer 35. As you go from left to right on the periodic table, describe the changes that occur to element's atomic structure ...
Chapter 4
... - found just below the metalloids in groups 3A, 4A, 5A - very unreactive. - Al is a good example. Used in soda cans because it does not react with the soda. ...
... - found just below the metalloids in groups 3A, 4A, 5A - very unreactive. - Al is a good example. Used in soda cans because it does not react with the soda. ...
Chapter 4 Chemical Foundations: Elements, Atoms, and Ions
... • Atoms of a given element are different from those of any other element. – Carbon atoms have different chemical and physical properties than sulfur atoms. ...
... • Atoms of a given element are different from those of any other element. – Carbon atoms have different chemical and physical properties than sulfur atoms. ...
Note-taking Strategy Your notes should contain a title with
... Summary: The idea of the atom was proposed over 2500 years ago. Democritus taught that the atom was the tiniest particle of matter. He thought of it as a tiny, indivisible, indestructible particle. However, his ideas were not based on any scientific experimenting. 2000 years later in England, John ...
... Summary: The idea of the atom was proposed over 2500 years ago. Democritus taught that the atom was the tiniest particle of matter. He thought of it as a tiny, indivisible, indestructible particle. However, his ideas were not based on any scientific experimenting. 2000 years later in England, John ...
EXPERIMENT
... In this experiment, you will be looking at some elements in the laboratory display. Some look different from each other, while others look similar. Elements can be categorized in several ways. In this experiment, you are going to group elements by similarities in their physical properties. Elements ...
... In this experiment, you will be looking at some elements in the laboratory display. Some look different from each other, while others look similar. Elements can be categorized in several ways. In this experiment, you are going to group elements by similarities in their physical properties. Elements ...
Chemistry Midterm Exam 2015 (Study Guide) Unit 1: Measurement
... In the measurement 0.202 L, which digit is the estimated digit? The last 2 How many significant figures are in the measurement 0.0027 kg? 2 How many significant figures are in the measurement 480,500 mg? 4 Express the sum of 7.68 m and 5.0 m using the correct number of significant digits. 12.7 Expre ...
... In the measurement 0.202 L, which digit is the estimated digit? The last 2 How many significant figures are in the measurement 0.0027 kg? 2 How many significant figures are in the measurement 480,500 mg? 4 Express the sum of 7.68 m and 5.0 m using the correct number of significant digits. 12.7 Expre ...
Nature of Matter
... elements in definite proportions. -The composition of compounds is shown as a chemical formula, Ex : Water is made of 2 hydrogen atoms & 1 oxygen atom. Its chemical formula is H2O. ...
... elements in definite proportions. -The composition of compounds is shown as a chemical formula, Ex : Water is made of 2 hydrogen atoms & 1 oxygen atom. Its chemical formula is H2O. ...
Radioactive Isotopes and Nuclear Equations
... mass. The number of protons defines the element. Some nuclei are unstable, so they decompose (or "decay") over time, spontaneously emitting particles and/or energy. Such emissions are called radioactivity (or radioactive decay) and such unstable atoms are referred to as radioactive isotopes. Differe ...
... mass. The number of protons defines the element. Some nuclei are unstable, so they decompose (or "decay") over time, spontaneously emitting particles and/or energy. Such emissions are called radioactivity (or radioactive decay) and such unstable atoms are referred to as radioactive isotopes. Differe ...
atom - Images
... the glowing paint onto dial numbers. The going rate, for painting 250 dials a day, was about a penny and a half per dial. The brushes would lose shape after a few strokes, so the U.S. Radium supervisors encouraged their workers to point the brushes with their lips, or use their tongues to keep them ...
... the glowing paint onto dial numbers. The going rate, for painting 250 dials a day, was about a penny and a half per dial. The brushes would lose shape after a few strokes, so the U.S. Radium supervisors encouraged their workers to point the brushes with their lips, or use their tongues to keep them ...
Science notes on Atoms, Periodic table
... -number of protons: 20 -number of neutrons: 20 (40-20) -number of electrons: 20 The # of protons= # of electrons. The # of neutrons is the atomic mass minus the # of protons. To draw the model of an element remember that the protons and neutrons go in the center and the electrons go on the orbitals. ...
... -number of protons: 20 -number of neutrons: 20 (40-20) -number of electrons: 20 The # of protons= # of electrons. The # of neutrons is the atomic mass minus the # of protons. To draw the model of an element remember that the protons and neutrons go in the center and the electrons go on the orbitals. ...
Atoms and Molecules
... Atoms are NOT indivisible – they can be broken apart into P+, neutrons, and e-. 2. Atoms can be changed from one element to another, but not by chemical means (chemical reactions). Can do it by nuclear reactions. 3. Atoms of the same element are NOT all exactly alike isotopes ...
... Atoms are NOT indivisible – they can be broken apart into P+, neutrons, and e-. 2. Atoms can be changed from one element to another, but not by chemical means (chemical reactions). Can do it by nuclear reactions. 3. Atoms of the same element are NOT all exactly alike isotopes ...