1 - Mr. MacGillivray
... A. Adding together the numbers of protons and electrons B. Subtracting the number of protons from the number of electrons C. Subtracting the number of protons from the mass number D. Adding the mass number to the number of protons 29. The sum of the protons and neutrons in an atom equals the: A. Ato ...
... A. Adding together the numbers of protons and electrons B. Subtracting the number of protons from the number of electrons C. Subtracting the number of protons from the mass number D. Adding the mass number to the number of protons 29. The sum of the protons and neutrons in an atom equals the: A. Ato ...
atoms
... have about the same number of protons and neutrons. Some nuclei are unstable because they have too many or too few neutrons. This is especially true for heavier elements such as uranium and plutonium. • The release of nuclear particles and energy is called radioactive decay. • In these nuclei, repul ...
... have about the same number of protons and neutrons. Some nuclei are unstable because they have too many or too few neutrons. This is especially true for heavier elements such as uranium and plutonium. • The release of nuclear particles and energy is called radioactive decay. • In these nuclei, repul ...
Name: Date: Chemistry 1 – Midterm Review Sheet Unit 1 – Scientific
... 1. Name four evidences that indicate a chemical change has taken place. a. Color Change b. Formation of a precipitate (solid) c. Formation of a gas d. Energy Transfer 2. Classify each of the following as a chemical change or a physical change. Write CC or PC. a. A pile of snow gradually vaporizes. - ...
... 1. Name four evidences that indicate a chemical change has taken place. a. Color Change b. Formation of a precipitate (solid) c. Formation of a gas d. Energy Transfer 2. Classify each of the following as a chemical change or a physical change. Write CC or PC. a. A pile of snow gradually vaporizes. - ...
Historical Development of an Atom - pams
... around the nucleus in specific layers or shells. Every atom has a specific number of electron shells. ...
... around the nucleus in specific layers or shells. Every atom has a specific number of electron shells. ...
atomic number - Teacher Pages
... • The modern periodic table contains over 100 squares, one for each element, arranged in order of atomic number. • An element’s properties can be predicted from its location in the periodic table. – The elements in a column are called a group,or family. The groups are numbered 1-18. Elements in each ...
... • The modern periodic table contains over 100 squares, one for each element, arranged in order of atomic number. • An element’s properties can be predicted from its location in the periodic table. – The elements in a column are called a group,or family. The groups are numbered 1-18. Elements in each ...
here
... (hydrogen and helium) have one energy level, those in the second row will have two energy levels and so on. Draw a circle to represent the nucleus of the atom. Write the symbol for the element, the number of protons and the number of neutrons inside this circle. Draw one or more circles around the n ...
... (hydrogen and helium) have one energy level, those in the second row will have two energy levels and so on. Draw a circle to represent the nucleus of the atom. Write the symbol for the element, the number of protons and the number of neutrons inside this circle. Draw one or more circles around the n ...
Chapter 1 File
... Tritium, however, is unstable and the nucleus decays (breaks apart). This is an example of radioactivity. Since all atoms are composed of protons, electrons and neutrons, all chemical and physical differences between elements are due to the differences in the number of these sub-atomic particles. Th ...
... Tritium, however, is unstable and the nucleus decays (breaks apart). This is an example of radioactivity. Since all atoms are composed of protons, electrons and neutrons, all chemical and physical differences between elements are due to the differences in the number of these sub-atomic particles. Th ...
EXPERIMENT 4 – The Periodic Table
... Primary substances, called elements, build all the materials around you. There are more than 109 different elements known today. The elements are composed of atoms, the smallest units that are characteristic of a particular element. Some elements occur in different forms, such as graphite and diamon ...
... Primary substances, called elements, build all the materials around you. There are more than 109 different elements known today. The elements are composed of atoms, the smallest units that are characteristic of a particular element. Some elements occur in different forms, such as graphite and diamon ...
Periodic Table
... in order 1-118 Each element has its own symbol and an average atomic _____________ Elements tend to get ___________ in atomic radius as you go down the group. Atomic number gets larger as you go across the row from _________to _________ (period) and down the _______. Some of the elements are named a ...
... in order 1-118 Each element has its own symbol and an average atomic _____________ Elements tend to get ___________ in atomic radius as you go down the group. Atomic number gets larger as you go across the row from _________to _________ (period) and down the _______. Some of the elements are named a ...
Atomic Structure and Periodic Table Review WS
... particle he was searching for, eventually named the proton, is 1840 times more massive than the electron even though it carries the same amount of charge. Before the nucleus was discovered, scientists had noticed and measured radioactivity in atoms. They observed that a sample of a pure substance li ...
... particle he was searching for, eventually named the proton, is 1840 times more massive than the electron even though it carries the same amount of charge. Before the nucleus was discovered, scientists had noticed and measured radioactivity in atoms. They observed that a sample of a pure substance li ...
Intro To The Periodic Table
... How Was The Periodic Table Created? • Throughout history elements were discovered at different times but they were not put in any order to classify them. ...
... How Was The Periodic Table Created? • Throughout history elements were discovered at different times but they were not put in any order to classify them. ...
Chemistry Unit 1 Revision
... The atom is a positively-charged sphere with negative electrons distributed throughout it. ...
... The atom is a positively-charged sphere with negative electrons distributed throughout it. ...
CH4 REVIEW
... number of neutrons mass number–atomic number 50 number of electrons number of protons 40 An answer to this exercise can be found at the end of the teacher edition. Scientists must determine the atomic number, or the number of protons, in the newly formed nucleus. The nucleus is that of a new ...
... number of neutrons mass number–atomic number 50 number of electrons number of protons 40 An answer to this exercise can be found at the end of the teacher edition. Scientists must determine the atomic number, or the number of protons, in the newly formed nucleus. The nucleus is that of a new ...
Structure of the atom
... carbon? Iron? (see periodic table, p.768) What is an isotope? (p. 321) ...
... carbon? Iron? (see periodic table, p.768) What is an isotope? (p. 321) ...
Atoms and Elements ppt - Mrs. Hoenshell Science 2016
... Objective: “I will be able to identify the parts of an atom and learn the symbols and the electrons, protons and neutrons for the first 20 elements in the periodic table.” Classwork: Intro to the Periodic Table Essential Questions: How does the structure of matter and the properties of elements a ...
... Objective: “I will be able to identify the parts of an atom and learn the symbols and the electrons, protons and neutrons for the first 20 elements in the periodic table.” Classwork: Intro to the Periodic Table Essential Questions: How does the structure of matter and the properties of elements a ...
atomic number.
... 4. atoms combine in certain whole-number ratios YES! Called the Law of Definite Proportions 5. In a chemical reaction, atoms are merely rearranged to form new compounds; they are not created, destroyed, or changed into atoms of any other elements. Yes, except for nuclear reactions that can change at ...
... 4. atoms combine in certain whole-number ratios YES! Called the Law of Definite Proportions 5. In a chemical reaction, atoms are merely rearranged to form new compounds; they are not created, destroyed, or changed into atoms of any other elements. Yes, except for nuclear reactions that can change at ...
PROFESSIONAL LEARNING COMMUNITY MODEL FOR ENTRY
... Prominent groups include alkali metals, alkaline earth metals, halogens, and noble gases. Regions of the periodic table are also broken up into two different regions: main group (or representative) elements and transition elements. An 'unknown' element's properties can be identified by examining the ...
... Prominent groups include alkali metals, alkaline earth metals, halogens, and noble gases. Regions of the periodic table are also broken up into two different regions: main group (or representative) elements and transition elements. An 'unknown' element's properties can be identified by examining the ...
Periodic Table of Elements – (155 points)
... B. Scientists have identified 90 naturally occurring elements, and so far created about 28 others. C.The _________________, alone or in combinations, make up our bodies, our world, our sun, and in fact, the entire universe. D.The most abundant element in the earth’s crust is __________________. II. ...
... B. Scientists have identified 90 naturally occurring elements, and so far created about 28 others. C.The _________________, alone or in combinations, make up our bodies, our world, our sun, and in fact, the entire universe. D.The most abundant element in the earth’s crust is __________________. II. ...
Atoms molecules Slide Guide Atoms ~ Atoms are the general term
... ~ Electrons are the __________ charged particles of atom. ~ Together, all of the electrons of an atom create a __________ charge that balances the positive charge of the protons in the atomic nucleus. ~ Electrons are extremely __________ compared to all of the other parts of the atom. The mass of an ...
... ~ Electrons are the __________ charged particles of atom. ~ Together, all of the electrons of an atom create a __________ charge that balances the positive charge of the protons in the atomic nucleus. ~ Electrons are extremely __________ compared to all of the other parts of the atom. The mass of an ...
Chapter 2 Notes
... C. States of Matter- on Earth matter occurs in 4 physical states 1. solids- molecules are in a fixed position relative to each other; atoms or molecules may vibrate, but do not switch positions; a solid resists changes in shape and volume 2. liquids- atoms or molecules remain close to one another bu ...
... C. States of Matter- on Earth matter occurs in 4 physical states 1. solids- molecules are in a fixed position relative to each other; atoms or molecules may vibrate, but do not switch positions; a solid resists changes in shape and volume 2. liquids- atoms or molecules remain close to one another bu ...
1411-Practice Exam 3 (ch6-8)
... Sodium and potassium have similar chemical and physical properties. This is best explained by the fact that both elements A) are active metals. B) are in Period 1 of the periodic table. C) have the same ground-state valence-electron configuration. D) have low relative atomic masses. E) have relative ...
... Sodium and potassium have similar chemical and physical properties. This is best explained by the fact that both elements A) are active metals. B) are in Period 1 of the periodic table. C) have the same ground-state valence-electron configuration. D) have low relative atomic masses. E) have relative ...