Building the Cell I atoms, molecules, water

Question 1

Matter

Answer 1

anything that takes up space and has mass.

Question 2

Element

Answer 2

Any substance that cannot be broken down to any other substance by chemical reactions.

Question 3

Compound

Answer 3

a substance consisting of 2 or more different elements combined in a fixed ratio.

Question 4

Essential element

Answer 4

A chemical element required for an organism to survive, grow, and reproduce.

Question 5

Trace elements

Answer 5

An element indispensable for life but required in extremely minute amounts.

Question 6

Atom

Answer 6

The smallest unit of matter that retains the properties of an element.

Question 7

Neutrons

Answer 7

A subatomic particle having no electrical charge (neutral), with a mass of about 1.7x10^-24 g, found in the nucleus of an atom.

Question 8

Protons

Answer 8

A subatomic particle with a single positive electrical charge with a mass of about 1.7x10^-24 g, found in the nucleus of an atom.

Question 9

Electrons

Answer 9

A subatomic particle with a single negative electrical charge and a mass of about 1/2000 that of a neutron or proton. One or more electrons move around the nucleus of an atom.

Question 10

atomic nucleus

Answer 10

An atom’s dense central core, containing protons and neutrons.