Quiz about Unit 2A Test Review: Atoms

Question 1

Which subatomic particle establishes the identity of the element?

Accepted Answer

protons

Answer

neutrons

Answer

electrons

Question 2

Which subatomic particle is never altered in an atom?

Accepted Answer

protons

Answer

neutrons

Answer

electrons

Question 3

Which subatomic particle varies in ions?

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Question 4

Which subatomic particle varies in isotopes?

Accepted Answer

neutrons

Answer

protons

Answer

electrons

Question 5

Which subatomic particle has a negative charge?

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Question 6

Which subatomic particle has a neutral charge?

Accepted Answer

neutrons

Answer

protons

Answer

electrons

Question 7

Which subatomic particle has a positive charge?

Accepted Answer

protons

Answer

neutrons

Answer

electrons

Question 8

Who developed this early atomic theory?

All atomic structure was made up of atoms which he believed to be tiny, hard spheres.

Accepted Answer

Dalton

Answer

Bohr

Answer

Rutherford

Answer

J.J. Thomson

Answer

Democritus

Question 9

Who's model contained the following principles?

1)Electrons occupy only certain orbits around the nucleus. Those orbits are stable and are called "stationary" orbits.
2)Each orbit has an energy associated with it. The orbit nearest the nucleus has an energy of E1, the next orbit E2, etc.
3)Energy is absorbed when an electron jumps from a lower orbit to a higher one and energy is emitted when an electron falls from a higher orbit to a lower orbit.

Accepted Answer

Bohr

Answer

Dalton

Answer

Rutherford

Answer

J.J. Thomson

Answer

Democritus

Question 10

Who's model contained the following principles?

1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.

Accepted Answer

Dalton

Answer

Bohr

Answer

Rutherford

Answer

J.J. Thomson

Answer

Democritus

Question 11

Titanium has five common isotopes: 46Ti (8.25%), 47Ti (7.44%). 48Ti (73.72%), 49Ti (5.41%), 50Ti (5.18%). What is the average atomic mass of titanium?

Accepted Answer

47.8669 amu

Answer

45.7936 amu

Answer

48.2571 amu

Answer

46.9883 amu

Question 12

Gallium has two naturally occurring isotopes: Ga-69 with mass 68.9256 amu and a natural abundance of 60.11%, and Ga-71 with mass 70.9247 amu and a natural abundance of 39.89%. Calculate the atomic mass of gallium.

Accepted Answer

69.7231 amu

Answer

68.7329 amu

Answer

67.8963 amu

Answer

70.4513 amu

Question 13

Which equation is used to find the charge of an ion?

Accepted Answer

p - e =

Answer

p + n =

Answer

m # - a # =

Question 14

Which equation is used to find the mass of an atom?

Accepted Answer

p + n =

Answer

p - e =

Answer

m # - a # =

Question 15

Which equation is used to find the neutrons in an atom?

Accepted Answer

m # - a # =

Answer

p + n =

Answer

p - e =

Unit 2A Test Review: Atoms

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