Yr 9 First Assessment

Question 1

Atom

Answer 1

-the smallest part of an element that can exist by itself

Question 2

Atomic mass

Answer 2

-found at the top of the symbol
-number of protons and neutrons together
-electrons do not affect it as they have a very small mass

Question 3

Atomic number

Answer 3

-found at the bottom of the symbol
-number of protons=number of electrons

Question 4

Isotopes

Answer 4

-different versions of atoms with the same number of protons but different number of neutrons
-atomic mass is different

Question 5

General Formula for RAM

Answer 5

-let’s say there are two isotopes
-the formula would be
ar= (mass of isotope 1× % of isotope 1) + (mass of isotope 2 x % isotope 2)/100

Question 6

What is the outer shell structure of an atom?

Answer 6

-2 for the first shell
-8 for the consecutive shells
-electrons like to orbit in pairs

Question 7

What happens when metals lose electrons?

Answer 7

-they gain positive ions

Question 8

What happens when metals gain electrons?

Answer 8

-they gain negative ions

Question 9

non-metal ions

Answer 9

-negative charge

Question 10

metal ions

Answer 10

-positive charge

Question 11

What happens when ionisation takes place on an element?

Answer 11

-it loses or gains electrons
-in order to get a full outer shell