C2 Chemistry - atomic structure and isotopes Flashcards Preview

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Flashcards in C2 Chemistry - atomic structure and isotopes Deck (10)
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1

what are atoms made up of?

a nucleus
protons
neutrons
and surround by electrons

2

what are elements?

different types of atoms

3

what charge do neutrons have?

no charge
neutral

4

what charge is the nucleus?

always positively charged

5

what charge does an atom how and why?

an overall neutral charge
has the same number of electrons and protons

6

what is an isotope?

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

7

what is molecular mass?

the mass of a molecule

8

what is a mole?

unit for amount of substance

9

how do you find the molar mass?

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

10

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

mass divided by molar mass