Ch. 2

Front 1

Matter

Back 1

Anything that takes up space and has mass

Front 2

Facts

Back 2

H = Only one proton, no neutron

93 naturally occurring elements, ~20 utilized by organisms

In the periodic table- valence e- increase from left to right

Front 3

Protons usually match # of neurons

Back 3

Atoms usually electrically neutral

Front 4

Atomic # & wt

Back 4

Differ by atomic # (#of protons)

H-1 C-6 O-8

Atomic wt = mass of P+N

Front 5

Isotope

Back 5

Different # of N 👉 different wt

Labeled by wt carbon-12, carbon- 13

Front 6

Bohr model atomic structure

Back 6

Front 7

(+) or (-) valence shell

Back 7

Depends on whether it's easier to give up or take e- to fill the valence shell

O has 6 valence e-, 2 spots to fill, 👉 -2

Ca has 2 valence e-, 2 to giveup, 👉 +2

Front 8

Chemical bond

Back 8

Bonded atoms by sharing or transferring e-

Front 9

Molecule

Back 9

Chemical bond of 2 or more same element

Front 10

Compound

Back 10

Molecule of 2 or more elements

Front 11

Electronegativity

Back 11

Attraction to another atom for its e- to fill a valence shell

Front 12

Why is C the backbone in bio molecules?

Back 12

It has 4 valence e- and a large potential for covalent bonds

Front 13

Organic compound

Back 13

Compound that contain C or H

ProA and carbs