C2 Chemistry - atomic structure and isotopes

Question 1

what are atoms made up of?

Answer 1

a nucleus
protons
neutrons
and surround by electrons

Question 2

what are elements?

Answer 2

different types of atoms

Question 3

what charge do neutrons have?

Answer 3

no charge

neutral

Question 4

what charge is the nucleus?

Answer 4

always positively charged

Question 5

what charge does an atom how and why?

Answer 5

an overall neutral charge

has the same number of electrons and protons

Question 6

what is an isotope?

Answer 6

isotopes have the same number of protons and electrons
have the same atomic number
same chemical reactions
different number of neutrons

Question 7

what is molecular mass?

Answer 7

the mass of a molecule

Question 8

what is a mole?

Answer 8

unit for amount of substance

Question 9

how do you find the molar mass?

Answer 9

you add together the relative atomic mass for all the atoms shown in the chemical formula

Question 10

how do you work out the number of moles in an experiment?

Answer 10

mass divided by molar mass