Unit 4 True False

A cation has a positive charge. An anion has a negative charge.

• True

• False

Chemical bonding always involves the innermost electrons of an atom.

• True

• False

The substances present at the beginning of the reaction are the products. The substances present at the end of the reaction are the reactants.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, bonds are broken and made, which requires energy

• True

• False

Tags

NGSS.HS-PS1-4

Chemical equations tell as scientists what substance are involved in a reaction and in what proportions they are needed.

• True

• False

Tags

NGSS.HS-PS1-7

The reactivity of an element depends on its ability to lose or gain a proton

• True

• False

An increase in temperature, pressure, or concentration can all affect the equilibrium of a reaction.

• True

• False

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

A reversible reaction is a chemical reaction where the products can react together to form the original reactants.

• True

• False

An inhibitor increases the power of a catalyst, speeding the reaction up. A promoter reduces the power of a catalyst, slowing the reaction down.

• True

• False

Tags

NGSS.HS-PS1-5

Catalysts can speed up a reaction by increasing the activation energy of the particular reaction.

• True

• False