Chemical bonds

What are called electrons on the outermost energy level?

• atom

• valence electron

• electron

What nonmetal element has one electron on the outermost energy level?

• Hydrogen

• sodium

• chlorine

Covalent bond are between.......

• two metals

• two or more nonmetals

• metals or nonmetals

Predict the bond that will form between C and H

• covalent

• ionic

• metalic

What are the electronic configuration of the sodium?

• 2ē8ē2ē

• 2ē7ē

• 2ē8ē1ē

Ionic bond are between........

• metal and nonmetal

• two or more metals

• two or more nonmetals

The electronic formula of the hydrogen molecule is:

• H·

• H-H

• H··H

Which element has bigger electronegativity?

• H

• Cl

• Na

Which column contains only formulas of simple substances?

• H₂, O₂, N₂

• H₂O, N₂, F₂

• Br₂, CH₄, NH₃

Which column contains only formulas of substances formed through covalent bond?

• H₂O, CH₄, HCl

• H₂O, NaCl, HCl

• N₂, CaCl₂, H₂O