Periodic Trends and Chemical Bonding

Which statement best describes the relationship between atoms & molecules.

• molecules are made of atoms that are chemically bonded together.

• atoms are made of molecules that are chemically bonded together.

• molecules are made of a mixture of atoms and compounds.

• atoms are made of protons, neutrons & electrons.

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Which statement describes the model that shows a compound.

• Model X shows a compound because there are two different types of atoms

• Model X shows a compound because two different atoms are chemically bonded together.

• Model Y dhows a compound because there is more than one type of atom.

• Model Y shows a compound because each pair of matching atoms can form a chemical bond.

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What do ionic bonds and covalent bonds have in common?

• Both types of bonds involve only one electron.

• Both types of bonds involve valence electrons.

• Electrons are transferred from one atom to another in both types of bonds.

• Electrons are shared between atoms in both types of bonds.

Which is the correct chemical formula for ammonia?

• NH

• N₃H₃

• N₃H

• NH₃

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Which statement is true?

• The bigger an atom, the more electrons it will share in a bond.

• The smaller an atom, the more electrons it will share in a bond.

• The more valence electrons two atoms share, the stronger the bond is between those atoms.

• The more valence electrons two atoms share, the weaker the bond is between those atoms.

What does this image show?

• three single covalent bonds

• one triple covalent bond

• three single ionic bonds

• one triple ionic bond

How many dots would there be in an electron diagram for silicon, one of the group 14 elements?

• 2

• 4

• 8

• 14

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Which statement is false?

• Molecules are made of atoms.

• Some compounds are made of covalent molecules.

• Some compounds are made of ions.

• Elements are made of molecules.

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What would cause fluorine to have the same electron configuration as a noble gas?

• gaining one electron

• losing one electron

• losing two electrons

• gaining two electrons

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Which two elements are likely to form an ionic bond?

• an atom with 1 valence electron and an atom with 8 valence electrons

• an atom with 4 valence electron and an atom with 6 valence electrons

• an atom with 2 valence electrons and an atom with 6 valence electrons

• an atom with 7 valence electrons and another atom with 7 valence electrons

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