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Chemistry > Elements & Compounds - Topic 1 > Flashcards

Elements & Compounds - Topic 1 Flashcards

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1
Q

Define element

Elements & Compounds

A

Substances made from only one type of atom.

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2
Q

How many elements are there?

Elements & Compounds

A

About 100 – they are listed on the Periodic Table.

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3
Q

How do we represent elements on the Periodic Table?

Elements & Compounds

A

With a symbol.

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4
Q

A student says the symbol for sodium is NA. What is wrong with this?

Elements & Compounds

A

Two capital letters, should be Na.

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5
Q

Define compound.

Elements & Compounds

A

Two or more atoms chemically bonded together.

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6
Q

How are compounds formed?

Elements & Compounds

A

When elements react together.

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7
Q

What are the signs of a chemical reaction?

Elements & Compounds

A

New product formed, temperature change, colour change, gas produced.

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8
Q

What is the formula for water?

Elements & Compounds

A

H2O

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9
Q

What is the formula for carbon dioxide?

Elements & Compounds

A

CO2

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10
Q

What is the word for an element that always exists as two atoms bonded together?

Elements & Compounds

A

Diatomic

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11
Q

Which elements exist diatomically?

Elements & Compounds

A

N2, H2, O2 and all of group 7

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12
Q

What is the rule for naming a compound when two elements react together?

Elements & Compounds

A

The compound name ends in -ide.

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13
Q

What is the rule if 3 or more elements are chemically joined and one of them is oxygen?

Elements & Compounds

A

The compound name ends in the suffix –ate

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14
Q

What is the name of LiF?

Elements & Compounds

A

Lithium fluoride

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15
Q

What is the name of CaBr2?

Elements & Compounds

A

Calcium bromide

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16
Q

What is the name of CuSO4?

Elements & Compounds

A

Copper sulfate

17
Q

What is the name of MgCO3?

Elements & Compounds

A

Magnesium carbonate

18
Q

Define molecule.

Elements & Compounds

A

Particle made from atoms joined together by covalent bonds.

19
Q

How many atoms are in H2?

Elements & Compounds

A

2

20
Q

How many elements are in H2?

Elements & Compounds

A

1

21
Q

How many atoms are in NH4NO3?

Elements & Compounds

A

9

22
Q

How many elements are in NH4NO3?

Elements & Compounds

A

3

Chemistry (9 decks)

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