Isotopes Chem quiz

An atomic mass unit (1 amu) is defined as

1/12 of the mass of a atom

Which notations represent hydrogen isotopes

1/1H and 2/1 H

What is the structure of a krypton-85 atom?

36 electrons, 36 protons, and 49 nuetrons

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

But they have different numbers of neutrons

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

Carbon

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

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

Neutrons

1 amu is approximately equal to

The mass of a single proton or neutron

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

Isotopes

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

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

atomic number does not change

Isotopes of the same element have the same atomic number but

different mass numbers (neutrons)

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

equal numbers of all the objects

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

isotopes of the same element

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

naturally occurring isotopes

isotopes are chemically alike because

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