radioactivity

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Question 1 of 1

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in an uncharged atom, how is the number of protons related to the number of electrons?

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in an unchanged atom how is the number of protons related to the number of electrons?

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what is an element

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a single

made up of only

type of

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what is an element?

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how do isotopes differ from each other?

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they have a different number of

and a different

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how are isotopes similar to each other?

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they have the same number of

and the same

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isotopes

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how do isotopes differ from each other
how are isotopes similar to each other

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different number of neutrons. diff mass number
same number of protons. same atomic number

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unstable nuclei

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unstable
ionisation

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creating charged particles by the loss of an electron
a nucleus that will disintergrate and emit radiation randomly and spontaneously

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what does 'unstable' mean

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spontaneously
disintegrate
radiation (alpha, beta or gamma)
and emit
a nucleus
that will
randomly and

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how can background activity in a school lab be measured?

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after 30 minutes, read the count of the counter
divide the count by 30 to obtain the background count rate in counts per minute
first remove known sources of radiation from the laboratory.
then set the GM counter to zero.
switch on the counter and start a stopwatch.

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what does half life mean?

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this is the time taken for

the

in any given

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what is the harm in radiation?

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radiation

the atoms in

and this can damage the

of a cell and the cell may become

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comment on how dangerous the 3 types of radiation are to a human if the radioactive source is outside the human body.

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alpha radiation is not as dangerous if the radioactive source is outside the body because it cannot

pass through the skin and is unlikely to reach cells inside the body. beta and gamma can

penetrate the skin and cause damage to skin cells.

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radioactivity

Question 1 of 1

Time Left

in an uncharged atom, how is the number of protons related to the number of electrons?

Fill in the blanks

(0/0)

in an unchanged atom how is the number of protons related to the number of electrons?

Select the correct answer(s).

(0/0)

what is an element

Fill in the blanks

(0/0)

what is an element?

Select the correct answer(s).

(0/0)

how do isotopes differ from each other?

Fill in the blanks

(0/0)

how are isotopes similar to each other?

Fill in the blanks

(0/0)

isotopes

Match the text (click and drag)

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how do isotopes differ from each other

how are isotopes similar to each other

different number of neutrons. diff mass number

same number of protons. same atomic number

unstable nuclei

Match the text (click and drag)

(0/0)

unstable

ionisation

creating charged particles by the loss of an electron

a nucleus that will disintergrate and emit radiation randomly and spontaneously

what does 'unstable' mean

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1

2

3

4

5

6

7

spontaneously

disintegrate

radiation (alpha, beta or gamma)

and emit

a nucleus

that will

randomly and

how can background activity in a school lab be measured?

Match the text (click and drag)

(0/0)

1

2

3

4

5

after 30 minutes, read the count of the counter

divide the count by 30 to obtain the background count rate in counts per minute

first remove known sources of radiation from the laboratory.

then set the GM counter to zero.

switch on the counter and start a stopwatch.

what does half life mean?

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what is the harm in radiation?

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comment on how dangerous the 3 types of radiation are to a human if the radioactive source is outside the human body.

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which radiation would be the most harmful if it gets inside your body e.g breathed or swallowed.

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I what way are the nuclei of the isotopes of an element the same?

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