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Building Blocks 1c Int 2

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Building Blocks 1c Int 2 5 6 7 1 2 3 4 10 14 8 9 11 12 13 15 16 17 Name the three sub atomic particles found in an atom. Name the particles found in the nucleus Where ... – PowerPoint PPT presentation

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Title: Building Blocks 1c Int 2


1
Building Blocks 1c Int 2
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2
Name the particles which make up an element?
Atom
3
Name the three sub atomic particles found in an
atom.
Proton, electron and neutrons.
4
Name the particles found in the nucleus
Protons and neutrons
5
Where are the electrons in an atom?
Outside the nucleus
6
State the charge and mass of a proton, neutron
and an electron.
Mass charge proton 1
1 electron 0
1- neutron 1 no charge
7
Which number identifies an element?
Atomic number
8
Why are atoms neutral?
They have the same number of positive charges and
negative charges
9
What does the atomic number tell you about an
atom?
The number of positive protons in the nucleus
10
What is the mass number of an atom?
The number of protons and the number of neutrons
added together
11
If an atom has an atomic number of 12, how many
electrons are there?
12
12
An element has a mass number of 19 and an atomic
number of 9. How many neutrons is in the atom.
19 - 9 10
13
Cl
Calculate the number of protons, electrons and
neutrons in the atom
protons 17 electron 17
neutrons 18
14
Why do potassium and sodium have similar chemical
properties?
They have the same number of outer electrons.
15
How many outer electrons do the elements in
groups 1 to 7 have?
Group Number of outer electrons 1 1

2 2 3 3
4 4
5 5
6 6
7 7



16
What are isotopes?
Atoms of the same element with the same atomic
number but different mass numbers.
17
Explain why strontium has a relative atomic mass
of 87.6 yet no strontium atom has this mass?
Elements are made up of isotopes with different
mass numbers. 87.6 is
the average mass of the isotopes.
18
What term is used to describe atoms of the same
element with different mass numbers.
Isotopes
19
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