Science 8 Quiz #2 3rd Quarter

Most of the mass of an atom is found in the ___________________.

• charges
• electrons
• electrons cloud
• nucleus

Every atom of the same element has___________________.

• the same mass
• the same atomic number
• same number of neutrons
• the same weight of an atom

How can atoms acquire a charge?

• By gaining or losing electrons
• By gaining or losing protons
• By gaining or losing neutrons
• Atoms cannot acquire a charge

The sum of the number of protons and the number of neutrons is known as ____________________.

• Atomic mass
• Atomic number
• Electro
• Proton

How to compute the number of neutrons of an atom?

• Always the same with number of proton
• Proton is added to electron of an atom
• The difference of atomic mass and atomic number
• The product of electron and proton

The atomic number tells the _____________________.

• number of electrons in the atom
• number of protons in the atom
• number of neutrons in the atom
• number of protons and neutrons

The number of protons and neutrons in a nucleus is the____________________.

• Atomic mass
• Atomic number
• Mass number
• Nucleons

Carbon has 6 protons. How many electrons does carbon have?

• 2
• 4
• 6
• 8

Sodium has an atomic number of 11. How many protons does Sodium (Na) have?

• 5
• 10
• 11
• 12

Hydrogen has one (1) proton and electron. How many neutrons does Hydrogen have?

• 1
• 2
• 3
• Zero