The Chemistry of life

Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom?

• It has 12 protons, 12 electrons, and 12 neutrons.

• It has 12 protons, 12 electrons, and six neutrons.

• It has six protons, six electrons, and no neutrons.

• It has six protons, six electrons, and six neutrons.

Which type of bond represents a weak chemical bond?

• Covalent bond

• ionic bond

• hydrogen bond

• polar covalent bond

An isotope of sodium (Na) has a mass number of 22. How many neutrons does it have?

• 22

• 12

• 11

• 44

The total number of protons and neutrons of the atom is its (a)  

organizational chart of elements

• Electron transfer

• Periodic table

• Octat rule

• Atomic number

What is the atomic mass of "F"?

• 9

• 18

• 17

• 19

You find out the number of protons in an atom by atomic number.

• True

• False

All matter is made of (a)   .

Which particle has a similar mass to a proton?

• Photon

• Marble

• Electron

• Neutron

A substance that is made up for one type of atom is called a(n) (a)