Chemistry Review-Bonding

A key for elements is represented by colored circles- Which diagram would best represent water?

• P

• Q

• R

• S

Tags

NGSS.MS-PS1-1

Which compounds contain the same metallic atom in their formulas?

• baking soda (NaHCO3) and household bleach (NaClO)

• carbon dioxide (CO2) and sucrose (C12H22O11)

• hydrochloric acid (HCl) and vinegar (HC2H3O2)

• table salt (NaCl) and water (H2O)

Tags

NGSS.MS-PS1-1

A student prepares a model of the production of water molecules, as shown.

A classmate classifies the atoms as covalently bonded. Is the classification correct?

• Yes. Hydrogen and oxygen are nonmetals.

• No. Oxygen has a greater atomic mass than hydrogen.

• Yes. Hydrogen is a metal, and oxygen is a nonmetal.

• No. Oxygen and hydrogen both form two bonds each.

Tags

NGSS.MS-PS1-1

The chemical formula for glucose is C6H12O6. How many atoms are found in one molecule of glucose?

• 3

• 4

• 24

• 25

Tags

NGSS.MS-PS1-1

Which statement accurately describes a compound with the chemical formula C6H12O6?

• The compound contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

• The compound contains 1 carbon atom, 2 hydrogen atoms, and 1 oxygen atom.

• The compound contains 6 carbon atoms, 6 hydrogen atoms, and 12 oxygen atoms.

• The compound contains 1 carbon atom, 12 hydrogen atoms, and 6 oxygen atoms.

Tags

NGSS.MS-PS1-1

A substance has one atom of sodium and one atom of chlorine. What is the chemical symbol for the element?

• H2O

• NaCl

• O2

• N2

Tags

NGSS.MS-PS1-1

Examine the equation for respiration.

What is the composition of water in the equation?

• Six molecules of water are composed of 12 atoms of hydrogen and 6 atoms of oxygen.

• Eight atoms of water are composed of 12 molecules of hydrogen and 6 molecules of oxygen.

• Six molecules of water are composed of 2 atoms of hydrogen and 1 atom of oxygen.

• Six atoms of water are composed of 2 molecules of hydrogen and 1 molecule of oxygen.

Tags

NGSS.MS-PS1-5

How many atoms are found in 9 molecules of nitrogen gas? (N2)

• 7

• 9

• 11

• 18

Tags

NGSS.MS-PS1-1

A student notices that in table salt, sodium bonds to chlorine to form the compound sodium chloride. How can the student justify a claim that sodium chloride is an ionic compound?

• Since sodium and chlorine are both metals, they bond by sharing an electron between their atoms.

• Since sodium is a metal, and chlorine is a nonmetal, they bond when chlorine transfers an electron to sodium.

• Since sodium and chlorine are both nonmetals, they bond by sharing an electron between their atoms.

• Since sodium is a metal, and chlorine is a nonmetal, they bond when sodium transfers an electron to chlorine.

The chemical formula for glucose is C6H12O6. How many types of elements are found in glucose?

• 3

• 4

• 24

• 25

Tags

NGSS.MS-PS1-1