2.1 Chemical Bonds & Reactions

An atom has 10 protons and 11 neutrons. What is the atomic number

• 10

• 11

• 21

• 22

An atom has a mass of 35 and an atomic number of 17. How many neutrons does this atom have?

• 35

• 17

• 18

• 52

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What charge do electrons have?

• positive

• negative

• neutral

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How are ions formed?

• Gaining or losing protons

• Gaining or losing neutrons

• Gaining or losing electrons

• Gaining of losing mass

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NGSS.HS-PS1-2

An atom has 6 protons and 7 neutrons. What element is this?

• Carbon

• Nitrogen

• Aluminum

• Oxygen

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What type of bonds share electrons?

• hydrogen

• covalent

• ionic

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What type of bond is shown in the image?

• Hydrogen

• Ionic

• Covalent

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Which of the following elements is a metal?

• Sodium

• Oxygen

• Hydrogen

• Argon

Why is water polar?

• It has ionic bonds

• It is partially charged

• It has a neutral charge

• It has a north and south pole

What to enzymes do?

• speed up a chemical reaction

• increase the energy of a reaction

• increase the time of a reaction

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