Isotopes Chem quiz

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17 Terms

1

All have the same number of protons, all have the same number of electrons

But they have different numbers of neutrons

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2

Isotopes

are atoms that have the same number of protons but different number of neutrons

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3

Isotopes of the same element have the same atomic number but

different mass numbers (neutrons)

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4

isotopes are chemically alike because

they have identical numbers of protons and electrons, which are the subatomic particles responsible for chemical behavior

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5

The number of neutrons in isotopes of an element does not change which element it is because the

atomic number does not change

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6

The nuclides I-131 and I-133 are classified as

isotopes of the same element

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7

Atoms of different isotopes of the same element differ in their total number of

Neutrons

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8

What is the structure of a krypton-85 atom?

36 electrons, 36 protons, and 49 nuetrons

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9

An isotope of which element has an atomic number of 6 and a mass number of 14?

Carbon

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10

An atomic mass unit (1 amu) is defined as

1/12 of the mass of a atom

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11

1 amu is approximately equal to

The mass of a single proton or neutron

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12

Atomic mass can be calculated from the mass and the abundance of

naturally occurring isotopes

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13

A weighted average (atomic mass) takes into account the fa that we do not have

equal numbers of all the objects

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14

A weighted average is calculated by

Multiplying the percentage of the object (as a decimal number) by its mass for each object and adding the numbers together

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15

Atoms of different isotopes of the same element differ in their total number of

Neutrons

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16

Which notations represent hydrogen isotopes

1/1H and 2/1 H

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17

The atomic mass of titanium is 47.88 atomic mass units. The atomic mass represents the

Weighted average mass of all naturally occurring isotopes of Ti

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