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Katie Science Tests > Test 4 > Flashcards

Test 4 Flashcards

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1
Q

Which of the following is not a principle of the atomic theory?

A

All atoms are made of subatomic particles

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2
Q

What substances are composed of a single type of atom?

A

elements

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3
Q

What is the only metal that is liquid at room temperature?

A

mercury

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4
Q

Which idea states that tiny particles do not absorb or release energy in a smooth flow?

A

quantum theory

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5
Q

What idea states that no two electrons in an atom can have the same four quantum numbers?

A

Pauli exclusion principle

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6
Q

What idea states that it is impossible to simultaneously know both the velocity and position of an electron?

A

Heisenberg uncertainty principle

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7
Q

Which subatomic particle has a negative charge?

A

electron

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8
Q

Which type of chemical bonding results from the transfer of electrons?

A

ionic

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9
Q

In which type of chemical bonding are electrons shared among all atoms in the substance?

A

metallic

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10
Q

Which type of chemical formula shows the general arrangement of atoms in molecules?

A

structural

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11
Q

What are molecules with the same number and types of atoms in different arrangements?

A

isomers

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12
Q

What are atoms of the same element that have different mass numbers?

A

isotopes

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13
Q

The rule that most atoms tend to react to obtain eight electrons in the outermost shell is the ? rule

A

octet

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14
Q

If an atom is covalently bonded to an atom with a different electronegativity, then the bond between them is?

A

polar

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15
Q

The name of the compound that contains one uranium atom and six fluorine atoms is?

A

uranium hexafluoride

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16
Q

Electrons that are shared by more than two atoms are said to be?

A

delocalized

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17
Q

By physical properties, elements are divided into three groups: metals, semimetals, and ?

A

nonmetals

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18
Q

If three pairs of electrons are shared between two atoms, the resulting bond is a(n) ? bond.

A

triple

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19
Q

An atom that has a positive electrical charge because of losing electrons is a(n)?

A

cation

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20
Q

Which of the following elements is an alkali metal?

A

sodium

21
Q

In what type of radioactive decay is an electron emitted?

A

beta

22
Q

What is the general name given to any row of elements of the periodic table?

A

period

23
Q

What is the simplest ratio of atoms in a nonmolecular compound?

A

formula unit

24
Q

Which of the following does not increase the rate at which a substance dissolves?

A

increasing concentration

25
Q

Inside what regions do electrons move unpredictably according to the electron-cloud model of the atom?

A

orbitals

26
Q

What element makes up most of the mass of the human body?

A

oxygen

27
Q

What term refers to the minimum amount of fissionable material required for a chain reaction to occur?

A

critical mass

28
Q

What are theoretical particles that may compose both protons and neutrons?

A

quarks

29
Q

What is the ability of a substance to dissolve in another substance?

A

solubility

30
Q

What property describes how strongly atoms of an element pull on electrons in a chemical bond?

A

electronegativity

31
Q

What type of substance in MnO4-

A

polyatomic ion

32
Q

What process occurs when an atomic nucleus breaks up or changes, emitting radiation?

A

radioactive decay

33
Q

What is a diagram showing the locations of all the atoms and outermost electrons in a compound?

A

Lewis structure

34
Q

What is the time required for one half of a radioactive sample to decay into a new substance?

A

half-life

35
Q

How many atoms of hydrogen are in the compound C2H4O2?

A

four

36
Q

What is a mixture containing tiny suspended clumps or particles called?

A

colloid

37
Q

What term describes the outermost shell of electrons of any atom?

A

valence electrons

38
Q

What is the sum of the atomic masses of all the atoms in a molecule?

A

molecular mass

39
Q

oxygen

A

O

40
Q

potassium

A

K

41
Q

sodium

A

Na

42
Q

gold

A

Au

43
Q

The process of combining two nuclei to form a heavier nucleus is fission

A

fusion

44
Q

The law stating that elements show regular and repeating properties when arranged by increasing atomic numbers is the periodic law.

A

true

45
Q

A substance that comes out of solution is said to precipitate.

A

true

46
Q

If the molecules of a mixture are not completely mixed together, the substance is a homogeneous mixture.

A

heterogeneous

47
Q

A substance with strong intermolecular forces typically has a lower boiling point than a substance with weak intermolecular forces.

A

higher

48
Q

Protons and neutrons are found in the atomic nucleus.

A

true

49
Q

The substance in a solution that is dissolved is the solvent

A

solute

Katie Science Tests (11 decks)

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