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Physical Science > Bonding and Water Review > Flashcards

Bonding and Water Review Flashcards

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1
Q

A substance made up of two or more atoms ina fixed proportion.

A

Compound

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2
Q

True or False: The properties of a compound are different from the properties of the elemnts that make up the compound.

A

True

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3
Q

H2O is a chemical _______________.

A

Formula

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4
Q

How many different elements make up H2SO4 ?

A

Three

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5
Q

How many total atoms are there in a H2SO4 molecule?

A

Seven

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6
Q

When atoms form compounds teh ultimate goal is for all the atoms to become chemically ___________.

A

Stable

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7
Q

What subatomic particles interact when bondng?

A

Electrons

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8
Q

When an atom of an element is stable the outer energy level ( with the excepetion of He and H) has _________ electrons.

A

Eight

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9
Q

Hydrogen only needs _______ electrons to be stable.

A

Two

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10
Q

When atoms form compounds, they will do one of three things with their valence electrons. What are those three things?

A

Gain, lose or share

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11
Q

The attractive force that holds the atoms of a compound together.

A

chemical bond

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12
Q

The noble gases in group 18 do not naturally form compounds because their outer energy level is _________.

A

full

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13
Q

This type of bond is formed between two opossitely charged ions. When one atoms gains an electron(s) and the other losses an electron(s).

A

ionic

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14
Q

A positiveley charged ion is a __________.

A

cation

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15
Q

A negatively charged ion is a ___________.

A

anion

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16
Q

A compound is electrically neutral because it has the same number of __________ as it does __________.

A

electrons, protons

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17
Q

The ability of an atom to attract bonding electrons.

A

Electronegativity

18
Q

As you go rightward and upward on the periodic table, electronegativity ___________.

A

increases

19
Q

When atoms share electrons in a bons, this is a(n) _____________ bond.

A

covalent

20
Q

___________ covalent bonds form beteen atoms of elements that have different electronegativity.

A

Polar

21
Q

____________ covalent bonds fornm between atoms of elements that are the same.

A

Nonpolar

22
Q

A __________ shows the direction of the pull of the electrons in a bond.

A

dipole

23
Q

Two shared electrons make a ____________ covalent bond.

A

single

24
Q

Four shared electrons make a _____________ covalent bond.

A

double

25
Q

Six shared electrons make a ________ covalent bond.

A

triple

26
Q

Water contains ___________ covalent bonds between hydrogen and oxygen and the overlal molecule is _________.

A

polar, polar

27
Q

The bondthat forms between water molecules is a __________ bond.

A

hydrogen

28
Q

Water has a ________ boiling point compared to other polar covalent substances due to the strong forces between the hydrogen bonds.

A

high

29
Q

Whay is water called the universal solvent?

A

It has the ability to dissolve many other like substances as well as ionic compounds

30
Q

An ionic compound breaks apart into anions and cations when dissolved in water, because they are more ___________ to water molecules than they are to one another.

A

attracted

31
Q

A property that causes like molecules to stick to one another.

A

cohesion

32
Q

A property that causes molecules of different substances to stick to one another.

A

adhesion

33
Q

water naturally forms into _____________ drops because this shape requires the least amount of energy.

A

spherical

34
Q

When water moves upward due to adhesion and cohesion.

A

capillary action

35
Q

The elastic surface of a liquid caused by the attraction of the particles to one another under the surface is called surface ___________.

A

tension

36
Q

Because water has a _________ heat of vaporization it creates a “blanket” that keeps the Earth warm at night.

A

high

37
Q

The density of solid water is _________ the density of liquid water.

A

less than

38
Q

Whe water freezes the density decreases because the volume ____________.

A

increases

39
Q
A
40
Q
A

Physical Science (1 decks)

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