Unit 3 CheckPoint Chem Oct 2023

What part of the atom does bonding involve?

• protons

• neutrons

• all electrons

• valence electrons

How does oxygen become an oxide ion?

• it loses 2 electrons

• it gains 2 electrons

• it shares electrons

• it releases energy

How many valence electrons do MOST atoms need to be stable?

• 2

• 8

• electrons equal to number of protons

• electrons equal to number of neutrons

In an ionic compound, the total positive charge of all the positive ions ___________ the total negative charge of all the negative ions.

• equals
• is more than

Valence electrons are found

• in the innermost energy level of an atom

• in the middle energy levels of an atom

• in the outermost energy levels of an atom

When an atom loses an electron, it becomes a

• positive ion

• negative ion

• neutral ion

• neutral atom

How are ionic bonds formed?

• Transfer of electrons
• Sharing of electrons

Cations

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Anions

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

What kind of bond forms between metals and nonmetals?

• Ionic Bonds

• Covalent Bonds

• Both bonds

• Neither bond