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Chem LEC > LEC MOD 1 > Flashcards

LEC MOD 1 Flashcards

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1
Q

anything that occupies space and has mass

A

Matter

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2
Q

Classifications of matter:

A

Pure Substances

Mixtures

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3
Q

A classification of matter that cannot be further purified and has a fixed composition.

A

Pure substancces

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4
Q

a classification of matter that are combination of two or more pure substances

A

Mixtures

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5
Q

Two types of Pure substances:

A

Elements

Compounds

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6
Q

type of pure substances that cannot be subdivided by chemical or physicla means but can be chemically combined

A

Elements

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7
Q

type of pure substance that are simply elements in fixed ratio; composed of two or more elements

A

Compounds

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8
Q

Types of mixtures:

A

Homogenous- uniform composition

Heterogenous- nonuniform composition

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9
Q

How many known elements are currently on IUPAC PTE?

A

118

90 occur naturally

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10
Q

he arranged known elements in order of increasing atomic weight;

A

Dmitri mendeleev

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11
Q

names of elements are derived from:

A

individuals in atomic sci
geographic loc
planets
mythological sources

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12
Q

Elements often encountered by MTs:

A 
Sodium Na
Potassium K
Calcium Ca
Phosphorus P
Iodine I 
Iron Fe
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13
Q

regulates the electrical balance in body fluids

A

Sodium Na

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14
Q
  • essential for nerve conduction

- regulated electrical balance in body fluids

A

Potassium K

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15
Q
  • strengthens bones and teeth

- essential in blood clotting

A

Calcium Ca

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16
Q
  • present in nucleic acids DNA RNA

- energy storage and transfer

A

Phosphorus P

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17
Q

-stimulates the production of thyroid hormones

A

Iodine I

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18
Q

essential in some proteins (hemoglobin, myoglobin)

A

Iron Fe

19
Q

Classification of Elements:

A

Metals
Non metals
Metalloids

20
Q

A classification of elements that are good conductors of heat and electricity; solid at room temp except for mercury Hg

A

Metals

21
Q

a classification of elements that are poor conductors of heat and have varying states at room temp

A

Non metals

22
Q

examples of NM at solid state in room temp

A

Sulfur

Carbon

23
Q

example of NM that is liquid state in room temp

A

Bromine

24
Q

examples of non metals in gas state in room temp

A

Nitrogen

Oxygen

25
Q

a classification of elements that possesses both M and NM proerties

A

Metalloids

26
Q

Enumerate Metalloids:

A 
Boron
Arsenic
tellurium
Astatine
Germanium
Antimony
Silicon
27
Q

a dense core that contains protons and neutrons

A

Nucleus

28
Q

Mass g of subatomic particles:

A

proton-1.673x10^-24
Neutron- 1.675x10^-24
Electron- 9.109x10^-28

29
Q

mass amu of subatomic particles

A

proton- 1.0073 amu
neutron- 1.0087 amu
electron- none

30
Q

standard value of AMU:

A

1.661x10^-24 g

31
Q

equal to number of protons and electrons

A

Atomic Number Z

32
Q

equal to sum of protons and neutrons

A

atomic mass/Mass number A

33
Q

atoms of the same element having a diff number of neutrons

A

Isotopes

34
Q

3 isotopes of hydrogen:

A

protium 0
deuterium 1
tritium 2

35
Q

weighted average of naturally occuring isotopes (amu)

A

atomic weight

36
Q

arrangement of electrons in electron cloud or extranuclear space/region

A

Electron Configuration

37
Q

regions of space within an electron shell that contains electrons

A

Electron Subshell

38
Q

electron subshells ans characteristics:

A

s- spherical
p- dumbell
d-four lobes
f- eight lobes

39
Q

regions of space within an electron subshell

A

Electron orbitals

40
Q

electrons placed in the outermost shell of the element

A

Valence Electrons

41
Q

Atomic Size in periodic trend:

A

size of an atom increases down a column, as the VE is farther from the nucleus
size of an atom decreases across a row, as the number of protons in nucleus increases

42
Q

energy needed to remove an electron from neutral atom

A

Ionization energy

43
Q

Ionization energy rule:

A

IE decreases down a column, as VE gets farther from nucleus

IE increases across a row, as protons in nucleus increases

Chem LEC (8 decks)

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