Atoms

Question 1

Matter

Answer 1

chemical elements in pure form and in combinations called compounds

Question 2

Element

Answer 2

a substance that cannot be broken down into another substance by a chemical reaction

Question 3

Compound

Answer 3

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

Question 4

96% of living matter

Answer 4

C, O, H, N

Question 5

~4% of living matter

Answer 5

P, S, Ca, K, Mg, Cl

Question 6

Traces in living matter

Answer 6

Fe, I, Mg, Zn etc.

Question 7

Atom

Answer 7

smallest unit of an element that retains the chemical properties of the element

Question 8

Energy

Answer 8

Capacity to cause change eg.work

Question 9

Potential energy of electrons

Answer 9

due to distance from nucleus, it takes “work” to move an electron farther away from the nucleus

Question 10

Electronegativity

Answer 10

atoms in a molecule attract shared electrons in varying degrees depending on the element (the more electronegative an atom is the more it will pull shared electrons closer to itself

Question 11

Crystal

Answer 11

each CRYSTAL is an aggregate of cations and anions bonded by their electrical attraction and arranged in a 3-D lattice

Question 12

Anion

Answer 12

gained an electron