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Chemistry Is Life Flashcards

(50 cards)

1
Q

What is a subatomic particle that circles an atom’s nucleus?

A

Electron

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2
Q

What is the smallest particle of an element called?

A

Atom

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3
Q

What is a charged atom or molecule?

A

Ion

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4
Q

What is caused by pollutants that combine with water in the air?

A

Acid precipitation

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5
Q

What is anything that occupies space and has mass?

A

Matter

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6
Q

What do two or more atoms held together by covalent bonds form?

A

Molecules

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7
Q

Where in an atom are the neutrons and protons found?

A

Nucleus

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8
Q

The cohesion of water molecules is responsible for what?

A

Surface tension

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9
Q

What are variant forms of an element with different numbers of neutrons called?

A

Isotope

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10
Q

What is the tendency of water molecules to stick together?

A

Cohesion

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11
Q

What is a subatomic particle with no electrical charge?

A

Neutron

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12
Q

What measures the intensity of heat?

A

Temperature

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13
Q

Electrons are shared unequally in a ——–covalent bond?

A

Polar

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14
Q

How many naturally occurring elements are there?

A

92

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15
Q

What contains two or more elements in a fixed ratio?

A

Compound

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16
Q

What are weak bonds between water molecules called?

A

Hydrogen

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17
Q

What donates H positive ions to solutions?

A

Acid

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18
Q

What is formed when two atoms share electrons?

A

Covalent bonds

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19
Q

What is a positively charged particle from the nucleus of an atom?

A

Proton

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20
Q

What is the dissolving agent in a solution called?

A

solvent

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21
Q

What is a liquid containing a uniform mixture of substances called?

22
Q

What forms went to ions of opposite charges attract each other?

23
Q

What is the substance dissolved in a solution?

24
Q

What excepts H positive ions and removes them from solution?

25
What is a substance that cannot be broken down chemically into other substances?
Element
26
What is the starting materials of a chemical reaction?
Reactants
27
What is the sum of protons and neutrons in any given atom?
Mass number
28
What is a bond within molecule in which the common electrons are not evenly shared thus creating an overall charge across the molecule?
Polar covalent bonds
29
What is a heterogeneous mixture in which the particles do not settle out example blood?
Colliod
30
What is a charged atom or molecule?
Ion
31
What are the number of protons in the nucleus of an atom?
Atomic Number
32
What is an electromagnetic attraction of ions of opposite charges?
Ionic bonds
33
What is a measure of how difficult it is to stretch of break the surface of a liquid?
Surface tension
34
What is an approximation of the total mass of an atom which is the mass in grams of one mole of the atom for all the represented isotopes for that element?
Atomic mass
35
What is the substance that is dissolved?
Solute
36
What is the sharing of a pair of valence electrons by two atoms?
Covalent bond
37
What is the outermost electrons in any given atom?
Valence electrons
38
What is the attraction of a particular kind of atom for the electrons of a covalent bond?
Electro negativity
39
What interactions result in atoms held by attractions or the sharing of electrons?
Chemical bonds
40
What is an atom of the same element with differing numbers of neutrons?
Isotope
41
What is the substance that minimizes changes in pH?
Buffer
42
What is the dissolving agent?
Solvent
43
What is a uniform mixture of two or more substances?
Solution
44
What is a substance that is composed of atoms of two or more different elements that are chemically combined?
Compound
45
What is a mixture with our uniform composition?
Homogeneous mixture
46
What is the binding together of water molecules due to hydrogen bonding?
Cohesion
47
What is a positive ion
Cation
48
What is a bond that forms when a hydrogen atom covalently bonded to an electronegative atom is also attracted to another electronegative atom (usually oxygen or nitrogen)?
Hydrogen bond
49
What is a compound that releases H positive ions when dissolved in water?
Acid
50
What is that energy due to the movement of molecules in a body of matter?
Heat