Protons, Neutrons, Electrons

How many protons are in Beryllium?

• 4
• 9
• 5
• 2

The number of neutrons equals...

• atomic number - mass number

• Protons - neutrons

• Electrons - protons

• mass number - atomic number

How many electrons does an Iodine atom have?

• 53
• 126
• 73
• 179

How many neutrons does an Oxygen atom have?

• 8
• 16
• 24
• 7.999

What is the atomic mass of Copper?

• 63
• 29
• 34
• 92

What is the atomic weight of Iron?

• 26
• 55.845
• 56
• 30

What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

What is an atomic number?

• The sum of protons and neutrons in an atom.
• The sum of protons and electrons in an atom.
• The number of protons in an atom of a specific element.
• The number of neutrons in a specific element.

Which of the following determines the type of element that an atom makes?

• The size of the nucleus.
• The number of protons.
• How much the atom weighs.
• The number of neutrons.

In an atom, what is the number of protons equal to?

• The number of electrons.
• The number of neutrons.
• The number of molecules.
• The number of nuclei.