Nature of Matter Reading Check

Which TWO subatomic particles are about equal in mass?

• Proton

• Electron

• Nucleus

• Neutron

What's the atomic symbol for sodium?

• S

• So

• Na

• Sd

Which subatomic particle is most important for chemical bonding?

• Electron

• Neutron

• Nucleus

• Proton

Which element is NOT important for biology?

• Carbon

• Platinum

• Oxygen

• Hydrogen

Isotopes are atoms with equal numbers of proton, but different numbers of ______________.

Carbon-14 is an isotope of carbon. How many neutrons does it have?

• 6

• 8

• 14

• 24

Radioactive isotopes can be used as ___________ to follow the movements of substances within organisms.

Which of these is NOT an element?

• Platinum

• Oxygen

• NaOH

• H

An ionic bond involves the _____________ of electrons.

• giving

• sharing

• taking

• misuse

Water is a covalently bonded molecule. Where are the covalent bonds?

• Between two oxygens

• Between two hydrogens

• Between one hydrogen and two oxygens

• Between one oxygen and two hydrogens