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Yr 9 Chemistry > Atoms > Flashcards

Atoms Flashcards

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0
Q

What charge do neutrons have?

A

Neutral

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1
Q

What charge do electrons have?

A

Negative

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2
Q

What charge do protons have?

A

Positive

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3
Q

What is the atomic proton number?

A

It tells us the number of electrons and protons in the element

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4
Q

What is the atomic number?

A

The number of protons added to the number of neutrons

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5
Q

How many electrons can go in each shell?

A

In the inner shell only two can fit in but in the rest of the shells 8 electrons can fit in

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6
Q

What is an ion?

A

An ion is a charged particle, it is an atom that has lost or gained electrons

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7
Q

What does independent value mean?

A

The independent value is the thing that you change to see how it affects the experiment

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8
Q

What is the dependant variable?

A

The dependant variable is the thing that must be changes as a result of the independent variable being changed

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9
Q

True or false, elements in the same group in the periodic table dont always have the same amount of electrons

A

False

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10
Q

What are the atoms in group 0?

A

These are called noble gases as they have stable arrangements of electrons and their shells are always full

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11
Q

What are all substances made of?

A

All substances are made of atoms, a substance that is made of only on sort of atom is called an element. These are shown in the periodic table of elements.

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11
Q

How many elements are there in the periodic table?

A

118

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11
Q

What are atoms of elements represented by?

A

Symbols eg, O - Oxygen and Na - Sodium

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11
Q

True or false, the number of protons in an atom is the same as the number of electrons?

A

True

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11
Q

How do you get the atomic mass number of an element?

A

You add the number of protons to neutrons

12
Q

If there was an element in group 3 how many electrons would it have?

A

5, two in the inner shell and three in the outer shell but all the electrons that dont fill up a shell determine what group the element is in

13
Q

What happens when elements react?

A

When elements react their atoms join together with other atoms to form compounds, this involves giving, taking or sharing electrons to form ions or molecules

14
Q

How do non metals become positive ion’s?

A

They loose electrons

15
Q

How do non metals become negative ion’s?

A

By gaining electrons

16
Q

What do ion’s always have?

A

A full outer shell

17
Q

What do compounds formed from non metals consist of?

A

molecules in which the atoms are held together with covalent bonds

18
Q

Are atoms lost during a chemical reaction

A

No

Yr 9 Chemistry (2 decks)

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