Chemistry of Life

A chemical ________ is a pure substance made entirely of 1 type of atom.

• element
• compound
• mixture
• blend

Tags

NGSS.MS-PS1-1

The isotopes of an element all have the same number of:

• electrons
• neutrons
• protons

The nucleus of an atom usually contains:

• protons and neutrons
• electrons
• electrons and protons
• isotopes

Tags

NGSS.MS-PS1-1

The purpose of an enzyme is:

• Do photosynthesis
• change chemicals into different chemicals
• speed up chemical reactions
• Eliminate water

A atom is defined as

• the smallest unit of life
• the smallest unit of matter
• the largest unit of life
• the largest unit of matter

Is H2CO3 a

• atom

• element

• molecule

Is nitrogen-14 a

• atom

• molecule

• element

Is P a

• molecule

• atom

• element

What determines the vast majority of an atom's properties?

• The size of the nucleus

• The number of electrons

• The number of neutrons

• The atomic number

There are 12 atoms in the molecule C3H8O

• True

• False