Biology Test Chapter 2: Mrs.dunn

Front 1

Protons and neutrons can be found were?

Back 1

in the atoms nucleus.

Front 2

Where are the electrons located?

Back 2

On the outside of an atom.

Front 3

Atomic mass is decide from the number of?

Back 3

Protons and neutrons

Front 4

You can find the number of neutrons by?

Back 4

Atomic number - mass number

Front 5

There are a same number protons as there is what? in a element

Back 5

Electrons

Front 6

Chemicals are in what?

Back 6

All living things

Front 7

Living things contain how many chemical elements?

Back 7

25

Front 8

How many elements are natural occurring.

Back 8

92, the rest are man made

Front 9

Which four makeup 94.4% of the body?Greatest to Least

Back 9

Oxygen, Carbon, Hydrogen, Nitrogen.

Front 10

Different arrangements of the atoms determine what?

Back 10

The unique properties

Front 11

The smallest unit of an element is what?

Back 11

Atom

Front 12

The electron arrangement determines what?

Back 12

The chemical properties of atoms

Front 13

Atoms are stable when?

Back 13

The outer-shell is full.

Front 14

How many can the first shell can hold? What about the second and third shell?

Back 14

first shell can hold 2. the second and third shell can hold 8

Front 15

These are the main types of chemical bonds between atoms from compounds.

Back 15

Ionic and Covalent.

Front 16

What is a ionic bond do?

Back 16

gives or takes(weak bond)

Front 17

Covalent bonds do what?

Back 17

join atoms into molecules through electrons sharing. share(strong)

Front 18

The chemical re activity of an atom depends on....

Back 18

number of electrons

Front 19

Molecuelse who share a equal amount of electrons are?

Back 19

non-polar.

Front 20

In a polar molecule one of part of the molecule is?

Back 20

Positive

Front 21

Hydrogen bonds make up?

Back 21

Water which is a cohesion

Front 22

Cohesion is?

Back 22

attraction force between molecules that are a like

Front 23

Surface tension is the result of?

Back 23

Cohesion of water molecules.

Front 24

Adhesion is?

Back 24

The attracive force between unlike molecules( like glass and water)

Front 25

Capillary action needs what to happen?

Back 25

Both cohesion and Adhesion

Front 26

Water hydrogen bonds do what to temperature?

Back 26

moderate (controls heat capacity)

Front 27

What is one way water can moderate temperature?

Back 27

Evoprative cooling

Front 28

What is the solvent of life?

Back 28

Water

Front 29

solution is?

Back 29

a homogeneous mixture of a liquid and one or more dissolved solutes

Front 30

water forms solution with?

Back 30

many polar and ionic compounds

Front 31

an aqueous solution is?

Back 31

An solution which water is a solvent.

Front 32

Cytoplasm is?

Back 32

a aqueous solution

Front 33

The chemistry of life is sensitive to Blank and Blank.

Back 33

Acid and basic conditions.

Front 34

If the number of H+ and OH ions are equal then?

Back 34

The solution is neutral

Front 35

Acidity is?

Back 35

Measured on the pH scale from 0-14 of most acids(pH is neutral)

Front 36

The pH of most cells is kept close to?

Back 36

7(neutral)

Front 37

Human blood remains between?

Back 37

7.34 and 7.44 (so we contain a buffer)