https://www.youtube.com/watch?v=NrfHJ5EJA1E atoms 1/4

Question 1

what are atoms

Answer 1

the basic unit of matter

the smallest particle of a chemical element that can exist

Question 2

all matter is made out of

Answer 2

atoms

Question 3

what are atoms made out of

Answer 3

neucleus with protons and neutrons and shells with electrons

Question 4

protons neutrons and electrons are called what

Answer 4

the sub-atomic particles

Question 5

what is an atom made out of

Answer 5

a neucleus, formed by the protons and electrons huddled together and is surrounded by electron shells

Question 6

how many electrons can the first shell hold

Answer 6

2

Question 7

how many electrons can the 2nd shell hold

Answer 7

8

Question 8

how many electrons can the third shell hold

Answer 8

8 when there are no shells above it

Question 9

an atom that has its outer electron filled up is what

Answer 9

a stable atom

Question 10

atoms are mainly empty space. true or false?

Answer 10

true

Question 11

what is the charge of protons

Answer 11

positive electric

Question 12

what is the charge of electons

Answer 12

negative electric

Question 13

what is the charge of neutrons

Answer 13

no charge

Question 14

what is the mass of a proton

Answer 14

large mass

Question 15

mass of a neutron

Answer 15

large mass

Question 16

mass of an electron

Answer 16

tiny mass

Question 17

where is the atomic number located

Answer 17

usually top left of the element

Question 18

where is the mass number located

Answer 18

usually bottom left of the element

Question 19

what does the atomic number tell us

Answer 19

the number of protons in the neucleus of the elements atom

Question 20

what does the mass number tell us

Answer 20

the amount of protons and neutrons in the element

Question 21

what else does the atomic number tell us

Answer 21

how many electrons are in the neucleus as the amount of protons are equal to the amount of electrons

Question 22

the number of what can change in an element

Answer 22

neutrons

Question 23

what are isotopes

Answer 23

when you have two of the atom but each have different amount of neutrons.

we can change the amount of neutrons in an atom to create isotopes

Question 24

if the number of neutrons change what else changes?

Answer 24

the mass number

Question 25

substances made of the same type of atom are called what

Answer 25

elements

Question 26

other atoms naturally have two or more of the same atom bonded together. what are these called

Answer 26

molecules

Question 27

what are molecules

Answer 27

a group of atoms bonded together

Question 28

what are elements

Answer 28

a substance that cannot be broken down into any other substance

substances made of the same type of atom are called what

each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms.

Question 29

what is a compound

Answer 29

a substance made up of two or more atoms

Question 30

a substance made up of two or more atoms is called what

Answer 30

a compound

Question 31

changing the amount of electrons in an atom and keeping the same amount of protons creates what

Answer 31

ions

Question 32

how do you get ions

Answer 32

by changing the amount of electrons in an atom and keeping everything else the same

Question 33

what shell do you add or remove electrons from to form ions

Answer 33

the outer shell

Question 34

how do you make a stable shell

Answer 34

by making the outer shell full. to do this you add or remove electrons depending

it needs to be 8 or 0.
so you totally fill it up or empty it completely

Question 35

how many electrons can the third shell hold when there are shells above it

Answer 35

18

Question 36

if you add an electron to an atom what charge do you get

Answer 36

-1

Question 37

if you take away an electron from an atom what charge do you get

Answer 37

+1

Question 38

+15e - 17e =
15 protons - 17 electrons

Answer 38

with two extra electrons the atom has a charge of
-2e

Question 39

how many types of ions are there

Answer 39

two

Question 40

what is an anion

Answer 40

anions have more electrons than protons so have an overall negative charge

Question 41

what is a cation

Answer 41

cations have less electrons than protons and have an overall positive charge

Question 42

what type of ion has more electrons than protons and have an overall negative charge

Answer 42

anions

Question 43

what type of ion has less electrons than protons electrons and an overall positive charge

Answer 43

cations

Question 44

cations are attracted to anions t or f and why

Answer 44

t
particles with opposite charge attract each other

Question 45

table salt is made out of what ions

Answer 45

Na+ and Cl-
+e -e

together they make NaCl
0e
since opposites attract

Question 46

NaCl
0e

is this balanced or neutral

Answer 46

both

Question 47

magnesium chloride are made out of what ions

balance it out

Answer 47

Mg2+ and Cl-
for the ionic compound to be neutral we need two Cl anions to balance out the Mg2+ cation.

Mg2+ 2Cl-
+2e -2e
+
= MgCl2
0e

Question 48

what is the drop and swap method

Answer 48

When the number of charges is different, a ‘swap and drop’ method can help. write down the symbol and charge of each ion in the compound. ignore the sign and if the number of the charges are the same, then write the formula in a 1:1 ratio.

Question 49

aluminium oxide is made from the atoms..

Answer 49

Al3+ and O2-

Question 50

using the drop and swap method

Answer 50

–>

Question 51

what is this called

Answer 51

the drop asnd swap method

Question 52

watch end of video for harde r equations

Answer 52

https://www.youtube.com/watch?v=NrfHJ5EJA1E