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Science > Chemistry Review > Flashcards

Chemistry Review Flashcards

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1
Q

Which of the following is an example of a chemical change?
a) Cutting grass b) rusting a nail c) percolating coffee d) clothes drying on a line.

A

b) rusting a nail

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2
Q

To find the number of neutrons in an atom, you must: a) add the atomic number and the atomic weight b) subtract the atomic number from the group number. c) subtract the atomic number from the atomic weight d) subtract the electric charge from the group number

A

c) subtract the atomic number from the atomic weight

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3
Q

The particles that are gained or lost by atoms when they react are: a) electrons b) protons c) neutrons d) ions

A

a) electrons

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4
Q

The staircase on the Periodic Table in important because it separates: a) ionic bonds from covalent bonds b) electrons from protons c) acids from bases d) metals from non-metals

A

d) metals from non-metals

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5
Q

Two elements that are likely to form a covalent bond when they react are: a) hydrogen and fluorine b) carbon and nitrogen c) magnesium and sulphur d) potassium and helium

A

b) carbon and nitrogen

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6
Q

The element which is MOST likely to form an ionic bond with oxygen is: a) boron b) magnesium c) hydrogen d) potassium

A

d) potassium

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7
Q

In the formula C3H8, there are: a) 3 carbon and 8 hydrogens b) 1 C 3+ ion and 1 H 8+ ion c) 3 carbons and 8 heliums d) 8 carbons and 3 hydrogens

A

a) 3 carbon and 8 hydrogens

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8
Q

The element which reacts MOST vigourously to lose electrons is: a) hydrogen b) francium c) aluminum d) polonium

A

b) francium

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9
Q

The non-metal which is BEST at stealing electrons from other atoms is: a) boron b) astatine c) fluorine d) radon

A

c) fluorine

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10
Q

In order to make a positive ion, an atom must: a) gain a proton b) lose a proton c) gain an electron d) lose an electron

A

d) lose an electron

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11
Q

Which of the following names is written correctly? a) sodium chlorine b) Sodium chloride c) Sodium Chloride d) Sodium chlorine

A

b) Sodium chloride

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12
Q

Which property of water causes its unusually high boiling point? a) It has heavy particles b) It can dissolve salt c) It is a polar molecule with + and - ends. d) It expands when it freezes.

A

c) It is a polar molecule with + and - ends.

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13
Q

Which of the following formulas represents a compound that can actually exist? a) HO2 b) C2O3 c) SiO2 d) MgHe2

A

c) SiO2

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14
Q

Ionic Bonds are formed when: a) two atoms of roughly the same strength share valence electrons b) a metal gains electrons from a non-metal to get six valence electrons in total c) a group 8 atom shares + ions with a non-metal to bond d) a strong non-metal takes electrons from a metal making + and - ions that bond.

A

d) a strong non-metal takes electrons from a metal making + and - ions that bond.

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15
Q

Covalent (or molecular) compounds are easily distinguished from ionic crystals by the fact that: a) ionic crystals are softer b) Ionic solutions conduct electricity while covalent solutions don’t c) ionic crystals are easy to melt d) covalent crystals have 6 sides while ionic crystals have 8 sides

A

b) Ionic solutions conduct electricity while covalent solutions don’t

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16
Q

When a clear, colourless, odourless gas is produced by a chemical reaction, you can test its identity using a burning wooden splint. You will know the gas is hydrogen if: a) it puts out the flames b) the gas explodes with a “pop” c) the glowing splint bursts back into flame d) the flame burns green and smells like chlorine

A

b) the gas explodes with a “pop”

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17
Q

Which of the following is a chemical change? a) crushing a sugar cube b) melting an ice cube c) dissolving salt in water d) reacting Zn with HCI to give H2 gas

A

d) reacting Zn with HCI to give H2 gas

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18
Q

An unidentified element is yellow, brittle, and does not conduct electricity. It is probably: a) a metal b) radioactive c) a non-metal d) unclassifiable

A

c) a non-metal

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19
Q

Metalloids are: a) used by aliens to build space ships b) are always ductile and are not solid at room temperature c) solids, dull and good conductors of heat and electricity d) solids that may be shinny or dull, may conduct but are not ductile

A

d) solids that may be shinny or dull, may conduct but are not ductile

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20
Q

Which of the following is NOT a property of metals? a) malleability (can be shaped/bent) b) ductility (can be stretched) c) lustre (can be shined) d) brittleness (breaks easily)

A

d) brittleness (breaks easily)

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21
Q

Which of the following used to organize the modern Periodic Table? a) atomic number b) atomic mass c) atomic size d) state at room temperature

A

a) atomic number

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22
Q

In a chemical reaction: a) total mass stays the same b) total mass is gained as electrons are transferred c) mass is lost as it changes to energy d) total mass is lost as protons are transferred

A

a) total mass stays the same

23
Q

Which atom or ion has the same number of electrons as the chloride ion (Cl -1)? a) Ne b) Cl c) K + d) N 5+

A

c) K +

24
Q

An element that can replace the S in K2S

A

Oxygen

25
Q

An element that is similar to silver but bigger

A

Gold

26
Q

An element that acts like phosphorus but is weaker

A

As

27
Q

An element that has only 2 electrons in the 3rd energy level

A

Magnesium

28
Q

An element that could have a charge of -2 or +6

A

Sulphur

29
Q

An element that can have a +1 or -1 charge

A

Hydrogen

30
Q

An element that has 3 full energy levels

A

Argon

31
Q

An element that acts like chlorine but is less reactive

A

Bromine

32
Q

In GLINCH, the G stands for:

A

Gas is produced

33
Q

In GLINCH, the L stands for:

A

Light is released

34
Q

In GLINCH, the I stands for:

A

Irreversible, it can’t go back

35
Q

In GLINCH, the N stands for:

A

New substance is produced

36
Q

In GLINCH, the C stands for:

A

Colour change occurs

37
Q

In GLINCH, the H stands for:

A

Heat is released or absorbed

38
Q

A pure substance made by bonding two or more atoms together

A

Compound

39
Q

The most important feature of metals in chemical reactions

A

Lose electrons

40
Q

A valence level that has eight electrons

A

Stable octet

41
Q

The most active non-metal

A

Fluorine

42
Q

A single type of atom

A

Element

43
Q

A chemical bond formed when electrons are transferred between atoms

A

Ionic Bond

44
Q

Elements on the right side of the Periodic Table that gain electrons

A

Non–metals

45
Q

A chemical bond formed when electrons are shared by two atoms

A

Covalent Bond

46
Q

This indicates the number of valence electrons in an atom

A

Group # on the Periodic table

47
Q

The most active metal

A

Francium

48
Q

Properties of ionic substances:

A

Solubility in Water, Conducts electricity, high melting point, hard, includes metals from group 1, 2 + 6, 7

49
Q

Properties of covalent substances:

A

Solubility in solvents (alcohol), Low melting point, soft, includes all non-metals

50
Q

Properties of Metals:

A

Hard, Shinny, Conducts electricity, High melting point, Flexible, React with acids, Solid, Loses electrons, Are dense

51
Q

Mg has a charge of 2+. F has a charge of 1-. What is the formula and name of the compound?

A

MgF2. Magnesium Fluoride

52
Q

K has a charge of 1+. N has a charge of 3-. What is the formula and name of the compound?

A

K2N. Potassium Nitride

53
Q

Al has a charge of 3+. S has a charge of 2-. What is the formula and name of the compound?

A

Al2S3. Aluminum Sulphide

54
Q

Si has a charge of 4+. F has a charge of 3-. What is the formula and name of the compound?

A

Si2P4. Silicon Phosphide

Science (6 decks)

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