Atoms

Question 1

Cant be created or destroyed

Answer 1

Matter

Question 2

can’t be broken down into other substances

Answer 2

Element

Question 3

Vital to life get less then 1% is needed

Answer 3

trace elements

Question 4

Smallest unit element that still has the same chemical properties

Answer 4

atom

Question 5

Let off a positive charge, is in the nucleus of the atom

Answer 5

proton

Question 6

No charge, in the nucleus

Answer 6

Neutron

Question 7

negative charge, orbits the nucleus

Answer 7

electro

Question 8

a or more atoms come together, by taking away or charing

Answer 8

molecule

Question 9

protons and neutrons, weight of atom

Answer 9

atomic mass

Question 10

number of protons

Answer 10

atomic number

Question 11

unbalanced number of protons and electrons

Answer 11

Ion

Question 12

Electon shevles
1st level holds \_\_\_ electrons
2nd level holds \_\_\_\_ electrons
3rd level holds \_\_\_\_ electrons
4th level can hold \_\_\_\_ electrons
5th level can hold \_\_\_\_\_ electrons

Answer 12

2
8
18
32
50

Question 13

Electrons on the outer most shell

does not want to combine with other atoms

Answer 13

Valence electrons

Question 14

When outer most energy shell is not full, atoms want to fill or get rid of their electrons

Answer 14

electron behavior

Question 15

Same number of protons but different number of neutrons, unstable, radioactive

Answer 15

Isotopes

Question 16

14c is unstable, causes the nucleus to decay spontaneously giving off energy
used in medicine, dangerous in large amounts

Answer 16

Radioactive isotopes

Question 17

One of more electrons get passed to another element
-very weak
-usually between mental and nonmetal
NA will pass one electron
Chlorine will accept on electron

Answer 17

Ionic bond

Question 18

Share electrons between two elements

• very strong
• occur between nonmetals

Answer 18

Convalent bond

Question 19

share electrons unequally

Answer 19

polar covalent

Question 20

shares electrons equally

Answer 20

non-polar covalent

Question 21

attractive interaction of a hydrogen atom with.a electronegative atom

• weak by its self
• strong when there are many

Answer 21

Hydrogen bond

Question 22

polar molecule

Answer 22

one side is positive the other side is negative, or the molecule has one negative charge and one positive charge

Question 23

What and how many elements make up water?

Answer 23

2 hydrogen and 1 oxygen

Question 24

What charge does the hydrogen atom let off in water?

Answer 24

positive

Question 25

what charge does oxygen let off in water?

Answer 25

negative

Question 26

What are bonds called between hydrogen atoms?

Answer 26

convalent

Question 27

What is a mixture?

Answer 27

a material composed of two or more elements or compounds

Question 28

What are two types of mixtures?

Answer 28

Solution and supsion

Question 29

Ions become dispersed in water

Answer 29

solute

Question 30

substances which the solutions desolve

Answer 30

solvent

Question 31

It can desolve ionic compounds and other polar molecules

Answer 31

water

Question 32

How many hydrogen bonds can a single water molecule have?

Answer 32

4

Question 33

attraction between molecules of the same substance

Answer 33

cohension

Question 34

attraction between molecules between different substances

Answer 34

adhesion

Question 35

why can ice flot on liquid water?

Answer 35

because it is less dense than water

Question 36

How does water hold up materials that are heavier han its self

Answer 36

surface tension

Question 37

what property of water gives it high surface tension

Answer 37

the cohension property

Question 38

What property of water allows the paper clips to be ttracted to the plan water

Answer 38

adhension

Question 39

vaporiazation

Answer 39

the amount of heat a liqid must absoreb per gram to evaporate

Question 40

when hydrogen bonds break and the hear causes the water to form into a gas

Answer 40

evaporate