HS-PS1-2: Chemical Reactivity

Which factor primarily determines an element’s chemical reactivity?

• The number of protons

• The number of valence electrons

• The number of neutrons

• The atomic mass

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NGSS.HS-PS1-2

NGSS.HS-PS1-1

What do elements in the same group of the periodic table have in common?

• The same number of protons

• The same number of neutrons

• The same number of valence electrons

• The same atomic mass

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NGSS.HS-PS1-2

NGSS.HS-PS1-1

Why do noble gases rarely form chemical bonds?

• They have high electronegativity

• They have a full outermost electron shell

• They have low atomic mass

• They lack protons

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NGSS.HS-PS1-2

NGSS.HS-PS1-1

What is the main reason sodium (Na) reacts strongly with chlorine (Cl)?

• Sodium has one valence electron and chlorine needs one electron

• Both have full outer electron shells

• Sodium and chlorine have the same electronegativity

• Both are noble gases

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which type of element typically forms positive ions?

• Nonmetals

• Metalloids

• Noble gases

• Metals

What happens to the reactivity of alkali metals as you move down Group 1?

• It decreases

• It increases

• It stays the same

• It depends on atomic mass

Which element is most likely to form a -2 ion?

• Lithium (Li)

• Oxygen (O)

• Sodium (Na)

• Magnesium (Mg)

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which of the following elements has chemical properties most similar to fluorine (F)?

• Oxygen (O)

• Neon (Ne)

• Chlorine (Cl)

• Sodium (Na)

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NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which type of bond forms between a metal and a nonmetal?

• Ionic

• Covalent

• Metallic

• Hydrogen

Which statement correctly describes a covalent bond?

• It forms when electrons are transferred from one atom to another

• It forms when electrons are shared between atoms

• It forms between two metal atoms

• It forms when atoms lose all their electrons