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Quiz > Long quiz chemistry > Flashcards

Long quiz chemistry Flashcards

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1
Q

OCCUPIES SPACE AND HAS MASS
•MAY EXIST AS SOLID, LIQUID OR GAS
•OCCURS IN NATURE AS PURE SUBSTANCE
AND IMPURE SUBSTANCE

A

MATTER

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2
Q

•

A

MACROSCOPIC

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3
Q

REFER TO PROPERTIES OF ATOMS
•THAT MEANS; THESE ARE THE PROPERTIES
OF ATOMS, IONS OR MOLECULES
•THESE CONSTITUENTS ARE INVISIBLE TO
THE NAKED EYE
•UNITS OF MEASUREMENT ARE TAKEN IN
MILLIMETRES, MICROMETRES,
NANOMETERS, PICOMETER
EXAMPLES: CHEMICAL BONDING,
ATOMICITY, INTERMOLECULAR
FORCES

A

MICROSCOPIC

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4
Q

ANY CHARACTERISTIC THAT
CAN BE DETERMINED WITHOUT
CHANGING THE SUBSTANCE’S
CHEMICAL IDENTITY.
• EXAMPLES:
•COLOR AND ODOR
•HARDNESS AND TEXTURE
•LUSTER
•VOLUME, SIZE, AND SHAPE
•POLARITY
•FREEZING, BOILING AND
MELTING POINT

A

PHYSICAL PROPERTIES

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5
Q

•ANY CHARACTERISTIC
THAT CAN BE DETERMINED
ONLY BY CHANGING A
SUBSTANCE’S MOLECULAR
STRUCTURE.
•HEAT COMBUSTION
•REACTIVITY WITH WATER
•PH LEVEL
•DECOMPOSITION
•FLAMMABILITY
•OXIDATION

A

CHEMICAL PROPERTIES

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6
Q

PART OF PHYSICAL OF ANY CHARACTERISTIC OF MATTER THAT
DOES NOT DEPEND ON THE AMOUNT OF
THE SUBSTANCE PRESENT.

A

INTENSIVE PROPERTY

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7
Q

PHYSICAL PROPERTY THAT HAS CHARACTERISTICS OF MATTER THAT
DEPENDS ON THE AMOUNT OF MATTER
BEING MEASURED.

A

EXTENSIVE PROPERTY

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8
Q

THE PHYSICAL
PROPERTIES (THE WAY
IT LOOKS, SMELLS AND
FEELS) MAY OR MAY NOT
CHANGE
. THE CHANGE CAN BE
REVERSIBLE
A NEW SUBSTANCE

A

PHYSICAL CHANGE

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9
Q

THE PHYSICAL
PROPERTIES
CHANGE
THE CHANGE IS NOT
REVERSIBLE
A NEW SUBSTANCE
IS PRODUCES

A

CHEMICAL CHANGE

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10
Q

PLASMA TO GAS

A

RECOMBINATION

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11
Q

GAS TO PLASMA

A

IONIZATION

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12
Q

GAS TO LIQUID

A

CONDENSATION

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13
Q

LIQUID TO GAS

A

VAPORIZATION

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14
Q

GAS TO SOLID

A

DEPOSITION

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15
Q

SOLID TO GAS

A

SUBLIMATION

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16
Q

SOLID TO LIQUID

A

MELTING

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17
Q

LIQ TO SOL

A

FREEZING

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18
Q

ABSORB HEAT

A

MELTING, EVAPORATION, SUBLIMATION, IONIZATION

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19
Q

RELEASE HEAT

A

FREEZING, CONDESATION, DEPOSITION, RECOMBINATION

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20
Q

PURE SUBSTANCE

A

ELEMENT, COMPOUND

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21
Q

IMPURE SUBSTANCE

A

HOMOGENOUS, HETEROGENOUS

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22
Q

Matter having an invariant chemical
composition and distinct properties

A

Pure substance

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23
Q

Fundamental substance; cannot be
separated into simpler substances by
chemical methods.

A

Element

24
Q

Substance composed of two or more
elements in fixed proportions; can be
separated into simpler substances and
elements only by chemical method.

A

Compound

25
Q

Matter consisting of two or more pure substances
that retain their individual identities and can be
separated by physical methods.

A

Impure substance

26
Q

Mixture having a uniform composition
and properties throughout

A

Homogenous

27
Q

The mixture not having uniform
composition and properties
throughout

A

Heterogenous

28
Q

MEANS “DIFFERENT”
•CONSISTS OF VISIBLY DIFFERENT
SUBSTANCES OR PHASES (SOLID, LIQUID, GAS)
•CAN BE SEPARATED BY FILTERIN

A

HETERO

29
Q

MEANS THE SAME
•HAS THE SAME UNIFORM APPEARANCE AND
COMPOSITION THROUGHOUT; MAINTAIN ONE
PHASE (SOLID, LIQUID, GAS)
•COMMONLY REFERRED TO AS SOLUTIONS

A

HOMO

30
Q

are the simplest substances. There are about
118 different elements.

A

Elements

31
Q

Each element is made up of very tiny particles called

A

Atoms

32
Q

is an element
made up of only
gold atoms.

A

Gold

33
Q

is an element
made up of only
carbon atoms

A

Carbon

34
Q

RED AND POSITIVELY CHARGED
GREEN AND NEGATIVE CHARGED
BLUE AND NEUTRAL CHARGED

A

PROTON
ELECTRON
NEUTRON

35
Q

The protons and neutrons
exist in a dense core at the
centre of the atom. This is
called the

A

Nucleus

36
Q

The electrons are
spread out around the
edge of the atom. They
orbit the nucleus in
layers called

A

Shells

37
Q

The word atom comes
from the Greek word
“atomos” which means

A

Invisible

38
Q

First to proposed the
idea that “All matter is
made up of atoms.

A

Democritus

39
Q

4 Main Concept:
►He deduced that all elements are
composed of atoms. Atoms are
indivisible and indestructible particles.
►Atoms of the same element are exactly
alike.
►Atoms of different elements are
different.
►Compounds are formed by the joining
of atoms of two or more elements.

A

John Dalton

40
Q

Discovered that atoms
contained subatomic
particles
► Very small, negatively
charged
► Electrons
► Discovered that atoms were
electrically neutral
► Contains positive charge to
balance negative charge
electrons

A

John Joseph Thomson

41
Q

His experiments led him
to believe that protons
are concentrated in a
small area at the center
of an atom called
Nucleus
► Thin sheet of gold foil
experimen

A

Ernest Rutherford

42
Q

Modified Rutherford’s
model
► Proposed that each
electron has a certain
amount of energy
► Helped electrons move
around nucleus
► Electrons move around
nucleus in region called
energy level

A

Niel’s Bohr

43
Q

There are two properties of protons, neutrons and electrons
that are especially important:

A

mass
electrical charge.

44
Q

Changes in the number of particles
in the nucleus (protons or neutrons)
are very rare. They only take place
in nuclear processes such as:

A

radioactive decay
nuclear bombs
nuclear reactors.

45
Q

When an atom loses or gains one or more electrons,
it acquires a net electrical charge and it is called an

A

Ion

46
Q

Number of protons and neutrons in an atom

A

Mass number

47
Q

Number of protons in atom

A

Atomic number

48
Q

Abbv. used to represent atom in chemical formulas

A

Atomic symbol

49
Q

The smallest particle that can exist on its own.

A

atom

50
Q

The number of protons in the nucleus
of an atom, also known as the proton number.

A

atomic number

51
Q

Negatively charged particle that orbits the
nucleus of an atom.

A

electron

52
Q

A substance made up of only one type of ato

A

element

53
Q

Different atoms of the same element. They
have the same number of protons and electrons, but a
different number of neutrons

A

Isotope

54
Q

The dense, positively charged centre of an
atom, made up of protons and neutrons.

A

Nucleus

55
Q

A neutral particle, with a mass of 1. It is found in
the nucleus of an atom.

A

neutron

56
Q

the number of protons and neutrons in
the nucleus of an atom.

A

mass number

57
Q

A positively particle, with a mass of 1. It is found
in the nucleus of an atom

A

proton

Quiz (5 decks)

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