atoms / elements

Question 1

metals

Answer 1

shiny substances that conduct electricity

Question 2

has little to no mass

Answer 2

electrons

Question 3

right of the staircase on periodic table

Answer 3

nonmetals

Question 4

mass =

Answer 4

protons + neutrons

Question 5

protons

Answer 5

positively charged found in the nucleus

Question 6

electrons

Answer 6

negatively charged surround the nucleus

Question 7

smallest unit of matter that still retains its original properties

Answer 7

atom

Question 8

3rd shell

Answer 8

8 electrons can hold up to 18 but is “full” at 8

Question 9

radiation

Answer 9

release of energy

Question 10

allows the isotope to assume a more stable form

Answer 10

radioactive decay

Question 11

atomic mass - atomic number =

Answer 11

number of neutrons

Question 12

electrons in the outermost shell

Answer 12

valence electrons

Question 13

nonmetals

Answer 13

gases or brittle solids; usually poor conductors of electricity

Question 14

occur when atoms gain or lose neutrons

Answer 14

isotopes

Question 15

left of the staircase on periodic table

Answer 15

metals

Question 16

elements are listed in order of __

Answer 16

increasing atomic number

Question 17

protons + neutrons

Answer 17

mass

Question 18

1st shell

Answer 18

2 electrons

Question 19

probability of finding electrons in a given area

Answer 19

shell

Question 20

anything that has mass and occupies space

Answer 20

matter

Question 21

release of energy

Answer 21

radiation

Question 22

protons and neutrons do not

Answer 22

have to be equal

Question 23

study if matter and its interactions

Answer 23

chemistry

Question 24

atomic number =

Answer 24

number of protons

Question 25

radioactive decay

Answer 25

allows the isotope to assume a more stable form

Question 26

2nd shell

Answer 26

8 electrons

Question 27

__ elements occur in nature

Answer 27

92

Question 28

elements are defined by

Answer 28

atomic number

Question 29

volume of the atom is

Answer 29

mostly empty space

Question 30

neutrons

Answer 30

no charge larger than protons found in the nucleus

Question 31

isotopes

Answer 31

-atoms with the same atomic numbers but different mass number -occur when atoms gain or lose neutrons -very high energy -unstable

Question 32

atomic number is found __ the chemical symbol

Answer 32

above

Question 33

atoms are composed of

Answer 33

protons neutrons electrons

Question 34

atoms with same atomic numbers but different mass number

Answer 34

isotopes

Question 35

number of electrons =

Answer 35

number of protons

Question 36

atomic mass is found __ the chemical symbol

Answer 36

below

Question 37

7 mineral elements make up 7% of body’s mass

Answer 37

sodium potassium calcium chlorine magnesium phosphorus sulfur