What I'm Struggling On

Question 1

what is the relative mass of a neutron

Answer 1

1

Question 2

what is the relative mass of a proton

Answer 2

1

Question 3

what is the relative mass of an electron

Answer 3

very small

Question 4

what is the charge of a neutron

Answer 4

0

Question 5

what is the charge of a proton

Answer 5

+ 1

Question 6

what is the charge of an electron

Answer 6

• 1

Question 7

why do atoms have no overall charge

Answer 7

there is an equal number of protons and electrons so the opposite charges cancel out, leaving neutrons that have no charge

Question 8

how do ions differ from atoms in terms of charge

Answer 8

atoms have no overall charge whilst ions are either positive or negative

Question 9

why do ions have a charge

Answer 9

they have an unequal amount of protons (+1) and electrons (-1)

Question 10

what does the atomic number tell us

Answer 10

how many protons an atom has. This is equal to the number of electrons it has as well

Question 11

where do you find the atomic number

Answer 11

left corner of an element displayed on the periodic table

Question 12

what does the atomic mass tell us

Answer 12

how many protons and neutrons there are in the nucleus and therefore the entire atom

Question 13

how do you find the number of neutrons in an atom

Answer 13

subtract the number of protons from the total of protons and neutrons to find out how many are left (in other words, minus the atomic number from the atomic mass)

Question 14

where do you always find electrons

Answer 14

the electron shells

Question 15

give an alternate name for an ‘electron shell’

Answer 15

energy level

Question 16

what is the maximum number of electrons that can be fit on the 1st shell

Answer 16

2

Question 17

what is the maximum number of electrons that can be fit on the 2nd shell

Answer 17

8

Question 18

what is the maximum number of electrons that can be fit on the 3rd shell

Answer 18

8

Question 19

how do you draw an atom as an ion (2)

Answer 19

• make sure the outer layer is full- you can do this by getting rid of excess electrons or adding on more
• draw brackets around the drawing on both sides and write whether the new charge is positive or negative

Question 20

how do you know if an ion is positively charged or negatively charged

Answer 20

if electrons have been taken away, the new charge is positive, if they have been added on, the new charge is negative

Question 21

write the symbol for sodium as a positive ion

Answer 21

[Na] +

[2,8] +