Ion, Isotope and Nuclear Chemistry Practice

In an atom, there are three types of subatomic particles. ______ are positively charged, ______ are negatively charged, and ______ are neutral.

• Protons, Electrons, Neutrons

• Electrons, Protons, Neutrons

• Neutrons, Protons, Electrons

• Electrons, Neutrons, Protons

The atomic number tells the number of ______ in an atom, which never changes.

• Protons

• Neutrons

• Electrons

An atom of an element with a different number of neutrons and therefore a different atomic mass

• Isotope

• Ion

• Atom

• Particle

Isotopes are atoms of the same element with different ____________.

• Number of Neutrons & Mass Number

• Number of Protons & Atomic Number

• Number of Protons, Neutrons, and Electrons

• Number of Electrons & Mass Number

Carbon-14 has ____ protons, ____ electrons, and _____ neutrons.

• 6, 6, 8

• 6, 6, 6

• 6, 6, 14

• 6, 10, 14

Using the picture, you can determine that Carbon-13 has ____ neutrons.

• 13

• 6

• 12

• 7

Calculate the average atomic mass of silver.

• 106.38649amu
• 111.91896amu
• 107.8677amu
• 121

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

Atoms of the same element which have a different number of neutrons are called _________________.

• ions

• isotopes

• quarks

• molecules

What is the mass number of this atom?

• 1

• 3

• 4

• 7