Chemistry 1- Atomic Structure+Periodic Table

Front 1

what is an atom?

Back 1

the smallest part of a chemical element that can exist

Front 2

what 3 things do atoms contain?

Back 2

protons

neutrons

electrons

Front 3

what is the nucleus?

Back 3

the middle part of an atom

Front 4

what does the nucleus contain?

Back 4

it contains protons and neutrons

Front 5

what charge does the nucleus in an atom have?

Back 5

positive charge

Front 6

what is an electron?

Back 6

a subatomic particle which moves around the nucleus in electron shells

Front 7

what charge does an electron have?

Back 7

it is negatively charged

Front 8

what is the mass of a proton?

Back 8

1

Front 9

what is the mass of a neutron?

Back 9

1

Front 10

what is the mass of an electron?

Back 10

very small - taken as 0

Front 11

what is the charge of a proton?

Back 11

+1

Front 12

what is the charge of a neutron?

Back 12

0

Front 13

what is the charge of a electron?

Back 13

-1

Front 14

what is the charge of an atom? and why?

Back 14

no charge. because they have the same number of protons as electrons

Front 15

does an ion have a charge? if so why/why not?

Back 15

yes has an overall charge. because the protons doesn’t equal the number of electrons

Front 16

what does an atomic number tell you?

Back 16

how many protons there are

Front 17

what does the mass number tell you?

Back 17

the total number of protons and neutrons in the atom

Front 18

how do you find the number of neutrons in an atom?

Back 18

subtract the atomic number from the mass number

Front 19

is the mass number the top or bottom number on the nuclear symbol?

Back 19

top number

Front 20

what is an element?

Back 20

a substance made up of atoms that all have the same number of protons in their nucleus

Front 21

what is an element?

Back 21

a substance made up of atoms that all have the same number of protons in their nucleus

Front 22

elements consist of atoms with the same a——— n———

Back 22

atomic number

Front 23

what is an element?

Back 23

a substance made up of atoms that all have the same number of protons in their nucleus

Front 24

elements consist of atoms with the same a——— n———

Back 24

atomic number

Front 25

there are about ... types of elements

Back 25

100

Front 26

what is an element?

Back 26

a substance made up of atoms that all have the same number of protons in their nucleus

Front 27

elements consist of atoms with the same a——— n———

Back 27

atomic number

Front 28

there are about ... types of elements

Back 28

100

Front 29

atoms can be represented by s_____

Back 29

symbols

Front 30

what is an element?

Back 30

a substance made up of atoms that all have the same number of protons in their nucleus

Front 31

elements consist of atoms with the same a——— n———

Back 31

atomic number

Front 32

there are about ... types of elements

Back 32

100

Front 33

atoms can be represented by s_____

Back 33

symbols

Front 34

what is an isotope?

Back 34

an isotope is different forms of the same element, which have the same number of protons but different number of neutrons

Front 35

so isotopes have the same ... but different .....

Back 35

same atomic number

but

different mass numbers

Front 36

so isotopes have the same ... but different .....

Back 36

same atomic number

but

different mass numbers

Front 37

what is a relative mass number?

Back 37

an average mass taking into account the different masses and abundance’s of all the isotopes that make up the element

Front 38

why use an relative atomic mass?

Back 38

because many elements exist as a number of differ isotopes, ram is used instead of mass number

this is referring to the element as a whole

Front 39

what is the formula for relative atomic mass?

Back 39

RAM= sum of (isotope abundance’s x isotope mass number)

dived by

sum of abundance’s of all the isotopes