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Chemistry > Science Unit Test > Flashcards

Science Unit Test Flashcards

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1
Q

How is the shape of the table related to the BRD of each element

A

So that the groups/families have the valence electrons in common with each other

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2
Q

What does the staircase on the periodic table mean

A

The metaliods

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3
Q

What are the properties of non-metals

A

Varied colours, not conductive, dull, not magnetic. It could be any of the states

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4
Q

What are the propeties of metals

A

Silver/gray, conductable, shiny, magnetic, solid (exept mercury)

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5
Q

What are the properties of metaliods

A

Some properties of metals, some of non-metals

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6
Q

Why is it called the periodic table

A

The horizontal rows are called ‘periods’

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7
Q

What group are the alakli metals in

A

1

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8
Q

What group are the alkaline earth metals in

A

2

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9
Q

what group are the halogens in

A

17

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10
Q

What group are the noble gases in

A

18

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11
Q

What’s the difference between the alkali metals and the alkaline earth metals

A

Alkali metals have one valence electron, whereas alkaline earth metals have two valence electrons. Alkali metals possess a low melting point, whereas alkaline earth metals possess’ high melting point. Alkali metals are more reactive than alkaine earth metals.

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12
Q

What’s the difference between halogens and alkali metals

A

Halogens are non-metals, alkali metals are metals. Halogens are poor conductors of heat and electricity, alkali metals are good ones.

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13
Q

Why aren’t noble gases reactive

A

They already have a full valence shell, so there is no need for them to gain any more.

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14
Q

Why are alkali metals reactive

A

Because they only have one valence electron, and it would be very easy to loose it

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15
Q

Why are halogens reactive

A

Because they have seven valence electrons, and it’s very close to having a full valence shell

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16
Q

Define isotope

A

One of two or more forms of an element that have the same number of protons but a different number of neutrons

17
Q

Define ion

A

A positively or negatively charged atom or group of atoms. With a different number of electrons.

18
Q

Define metal

A

Typically an element that is hard, shiny, malleable, and ductile, and is a good conductor for heat and electricity

19
Q

Define non-metal

A

Typically an element that is not hard, shiny, malleable, or ductile, and is not a good conductor for heat and electricity

20
Q

Define metaliod

A

An element that shows some properties with metals and some properties with non-metals

21
Q

Define family/group

A

A vertical group of elements in the periodic table

22
Q

Define period

A

A horizontal row of elements in the periodic table

23
Q

Define noble gases

A

Any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table.

24
Q

Define ionic compound

A

A compound made of oppositely charged ions.

25
Q

Define ionic bond

A

A chemical bond that forms between oppositely charged ions.

26
Q

Define covalent bond

A

A chemical bond in which two atoms share one or more pairs of electrons.

27
Q

What are the two kinds of ions

A

Cations (positive) and anions (negative)

28
Q

Why do ionic bonds attract

A

Because one has a negitive charge and one has a positive charge, and positive and negitive charges attract.

29
Q

What is electronegivity

A

The ability of an atom to pull electrons

30
Q

How can you typically idetify an ionic compound

A

It consists of a metal and a non-metal

31
Q

How do you write out the chemical formula for ionic compounds

A

The metal first with the amount of them you need, then the non-metal with the amount of them you need.

32
Q

What group are chalcogens

A

16

33
Q

How do you tell the difference between a covalent bond and an ionic bond

A

Ionics are far apart, covalents are close together. If it’s two non-metals, it’s ionic, if it’s a metal and a non-metal, it’s ionic

34
Q

Whats the two types of covalent bonds

A

Polar and non-polar

Chemistry (4 decks)

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