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Chemistry Test 3

Chemistry Chapter 4&5 review

QuestionAnswer
Dalton's atomic theory states that all atoms are identical. False
Dalton's atomic theory states that a chemical reaction involves either the union or separation of individual atoms. True
Dalton's atomic theory states that atoms are composed of protons, electrons, and neutrons. False
Dalton's discoveries provided physical explanations for reactions that could be expressed in quantitative terms. True
Dalton's atomic theory states that all matter is made up of tiny atoms. True
Dalton's atomic theory states that atoms can be created and/or destroyed. False
Neutrons carry no charge and are located in the nucleus of the atom. True
Protons and electrons are found in the nucleus of the atom. False
Neutrons determine the nuclear reactivity of an atom. False
The proton and electron have opposite electrical charges. True
Protons determine the chemical reactivity of an atom. False
All atoms of an element have the same number of electrons. False
The atomic number is found on the periodic table. True
The mass number represents the number of protons. False
The sum of the negative and positive integers in an atom is the charge. True
The atomic number represents the number of the neutrons. False
The mass number is found on the periodic table. False
Isotopes are atoms of the same element that contain different numbers of neutrons. True
Ions are atoms that carry a net charge. True
Cations are ions that carry a negative charge. False
What is the atomic number of an atom that has 15 protons? 15 (Atomic number represents number of protons.)
If an atom has 18 protons and 18 electrons, what is the charge? 0
What is the mass number of an atom that has an atomic number of 8 and 9 neutrons? 17 (protons plus neutrons)
If an atom has a charge of -2 and an atomic number of 7, how many electrons does it have? 9 (because atomic charge equals protons minus electrons)
If an atom has an atomic number of 1 and a mass number of 4, how many neutrons does it have? 3 (because mass number equals protons plus neutrons)
If an atom has a charge of +1 and 17 electrons, how many protons does it have? 18 (because charge equals protons minus electrons)
If an atom has an atomic number of 19 and 16 electrons, what is the charge? +3 (because charge equals protons minus electrons)
What is the mass number of an atom that has 5 protons and 10 neutrons? 15 (because mass number equals protons plus neutrons)
24/12Mg+2 has how many electrons?
What is the atomic number of an atom that has 11 neutrons and a mass number of 20? 9 (because mass number equals protons plus neutrons)
How many protons does an atom of carbon have? 6
If a sulfur atom has a mass number of 30, how many neutrons does it have? 14 (because mass number equals protons [or atomic number] plus neutrons)
If an oxygen atom has 10 electrons, what is the charge? -2 (because charge equals protons [or atomic number] minus neutrons)
What is the mass number of magnesium atom with 10 neutrons? 22 (because mass number equals protons [or atomic number] plus neutrons)
If an atom has a charge of +1 and 5 protons, how many electrons does it have? 4 (because atomic charge equals protons minus electrons)
What is the formula to find atomic charge? Atomic charge = protons - electrons
What is the formula to find mass number? Mass number = protons + neutrons
If an atom has an atomic number of 1, how many protons does it have? 1 (because they are the same)
7/3Li+1 has how many neutrons? 4
What is the atomic number of sodium? 23
What is the mass number of 40/19F-1?
What is the charge of 12/6C?
What is the atomic number of 40/18Ar? 18
If an atom has 8 protons and a mass number of 18, how many neutrons does it have? 10 (because mass number = protons + neutrons)
35/17Cl-1 has how many protons? 17
If an atom of neon is neutral, how many electrons does it have? 10 (because neutral charge of 0 = protons - electrons)
If a fluorine has a charge of -1, how many electrons does it have? 10 (charge = protons - electrons)
If an atom has 11 neutrons and a mass number of 18, how many protons does it have? 7 (mass number = protons + neutrons)
What is the atomic number of an atom that has a charge of +3 and 10 electrons? 13 (charge = protons - electrons)
Created by: Dirtbikes1234