2025 Bonding/Characteristics of a Chemical Reaction Review

1) An interaction that holds two atoms together

• chemical bond
• ionic bond
• covalent bond
• metallic bond

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NGSS.HS-PS1-1

2) Two atoms form a bond by sharing electrons. What type of bond must it be?

• ionic
• covalent
• metallic
• chemical

3) When an atom gains or loses an electron, it becomes ___________________.

• an ion
• a molecule
• a valence electron
• a polytatomic ion

4) What type of bond does lithium and chlorine make?

• ionic
• covalent
• metallic
• chemical

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NGSS.HS-PS1-3

5) Boron has 5 electrons and 3 of the electrons are in its outer level. Those outermost electrons in that level would be considered...

• valence electrons
• polyatomic ions
• energy levels

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6) A bond that involves a "sea of swimming electrons"

• chemical
• ionic
• covalent
• metallic

7) If hydrogen (a non-metal) combines with oxygen (a non-metal), what type of bond does it create?

• ionic
• covalent
• metallic
• polyatomic

8) When sodium transfers an electron to chlorine and now has one more proton than electron, what is its total charge?

• 2+
• 1+
• 3+
• 1-

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NGSS.HS-PS1-2

9) A certain atom has 5 outer electrons. How many MORE electrons would it need when it forms a bond?

• 6 electrons
• 2 electrons
• 3 electrons

• 8 electrons

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

11) If you were going to draw the dot diagram for neon, how many electrons would you put around the symbol?

• -1
• 8
• 7
• 17

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NGSS.HS-PS1-1

NGSS.HS-PS1-2