Chem Flashcards

(37 cards)

1
Q

What are the three states of matter

A

Solid, liquid and gas

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2
Q

What is freezing

A

When a substance changes from a liquid state to a solid-state

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3
Q

What is boiling

A

The process by which a liquid turns into a vapor when it is heated to its boiling point

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4
Q

What is evaperation

A

The process where an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils

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5
Q

What is condensing

A

When a gas turns to a liquid

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6
Q

What is sublimation

A

When a substance changes from a solid phase to a gas phase without turning into a liquid

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7
Q

What is deposition

A

When a gas turns into a solid without turning into a liquid

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8
Q

What are the three parts of an atom

A

Proton, neutron and electron

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9
Q

What is the charge of a neutron

A

Neutral eletric charge (neither posative nor negative)
0

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10
Q

Relative mass of an electron

A

1

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11
Q

What is the charge of a proton

A

+1

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12
Q

What is the charge of an electron

A

-1

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13
Q

What is a group on the periodic table

A

The vertical collums are called groups

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14
Q

What are periods in a periodic table

A

The horizontal rows

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15
Q

What is an element

A

A substance made up of only one sort of atom

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16
Q

What is a compound

A

A substance made up of 2 or more different elements that have been chemically joined

17
Q

What is a mole

A

the Avogadro constant number of particles (which is 6.02 × 10 23 )

18
Q

What is Avogadro’s number

19
Q

Relative mass of an electron

A

Almost zero 0.0005

20
Q

What is the atomic number

A

The number of protons in the nucleus of an atom or element (the smaller number of the two on the periodic table most of the time)

21
Q

Mass number

A

is the larger of the two numbers shown in most periodic tables, the sum of the protons and nuetrons in an atom’s nucleus is the mass number.

22
Q

Mixture

A

2 or more elements/compounds mixed together but not joined

23
Q

What symbol is hydrogen

24
Q

What symbol is sodium

25
What symbol is calcium
Ca
26
What symbol is sulfur
S
27
What symbol is helium
He
28
What symbol is iron
Fe
29
What symbol is chlorine
Cl
30
What symbol is magnesium
Mg
31
What symbol is zinc
Zn
32
What symbol is gold
Au
33
What symbol is potassium
K
34
What does di mean
2 e.g. dioxide 2 oxygen
35
Mon
1 e.g. nitrogen monoxide
36
Tri
3 e.g. supher trioxide
37
What is a covalent bond
Shaired pair(s) of electrons between two atoms