Transcript Bonding Quiz

C2 1.1
True or false?
How to play:
• Put your hand up for true, leave
your hand down for false.
• Keep track of your score.
AQA Science © Nelson Thornes Ltd 2006
1
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The middle of an atom is called
the nucleus.
TRUE
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2
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In an atom, the protons and
electrons are in the nucleus.
FALSE – only neutrons and
protons are in the nucleus.
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3
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The atomic number gives the
number of protons in an atom.
TRUE
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4
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The number of protons in an
atom is equal to the number of
electrons in that atom.
TRUE
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5
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The elements in the periodic
table are arranged in order of
atomic number.
TRUE
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6
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The maximum number of
electrons in the first shell is 8.
FALSE – it is 2.
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7
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The atomic number is also called
the neutron number.
FALSE – it is called the proton
number.
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8
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The charge on an electron is
zero.
FALSE – an electron has a
charge of –1.
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9
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What is your score out of 8 …?
Try to beat your score next time
or get 100% again!
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10
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Ionic bonding game
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11
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What is the correct way to show
a sodium ion?
+
Na
–
Na
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12
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What charge would be on a
hydrogen ion?
+1
–1
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13
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Melting points of ionic
compounds are…?
low
high
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14
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Carbon dioxide has an ionic
bond.
True
False
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15
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Metals always make positive
ions.
True
False
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Atomic Scientists
C2 1.7
How have our ideas
about atoms changed
over the years?
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17
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My name is Democritus and I
am the father of the atomic
theory! I was born in 460 BC,
and put forward the idea of
atoms. Even the word ‘atom’
comes from a Greek word
meaning ‘cannot be cut’. I
suggested that atoms were
the smallest possible particles
and that everything in the
world was made from them
stuck together in different
patterns.
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18
My name is John Dalton and I was
the first modern man to take
atoms seriously. I was born in
1766.
I suggested that atoms are small,
cannot be broken apart and join
together to make everything
around us. We know that water
contains hydrogen and oxygen so I
suggested that one atom of
hydrogen linked with one of
oxygen to make a new compound
– water!
Democritus? Never heard of him!
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19
My name is J. J. Thompson but
my friends call me JJ. I was
born in 1856 and spent a lot of
time working in the famous
Cavendish Laboratory in
Cambridge.
I put forward the ‘plum pudding’
model of the atom based on
work I did with cathode ray
tubes (the thing you used to
use for televisions). I suggested
an atom consists of a tiny
sphere with even smaller,
negatively charged particles
called electrons embedded in it
… like fruit in a Christmas
pudding!
Pity Dalton didn’t know about
electrons.
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20
My name is Ernest Rutherford. I was
born in 1871 in New Zealand. I
actually worked with ‘JJ’ and built on
his plum pudding model to show that
most of the atom was empty. Most of
the mass was held in a tiny central
nucleus with electrons flying around it
like planets around the Sun. When JJ
retired I took over his job at the
Cavendish.
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21
My name is Neils Bohr and I was
born in 1885 in Copenhagen.
I worked with Rutherford and JJ
Thompson and in 1913 I
published a paper that showed
how electrons flying around the
atom fitted into shells – they
didn’t just move randomly!
I worked hard all of my life on
atomic physics and only just
escaped from Germany when the
Nazis came to power. I ended up
for a while in America where I
worked on the atomic bomb
project. After the war I spent a
lot of time campaigning for
peaceful uses of nuclear
technology – including writing to
the United Nations.
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22
My name is James Chadwick and I
was born in 1885 in Cheshire. And
yes, I also worked with Rutherford!
My discovery was the neutron. It’s a
tiny particle in the nucleus with a
mass of one unit but no charge at
all. It explains how different atoms of
the same element can have different
weights. It was an essential part of
the theory that has led to the
modern understanding of atoms.
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