Chem - Ch. 7 + 8 Quiz

Question 1

electrons in highest occupied energy level

Answer 1

valence electron

Question 2

shows only the element symbol and the amount of valence electrons

Answer 2

electron dot structure

Question 3

loses electrons and becomes more positive

Answer 3

cation

Question 4

gains electrons and becomes negative

Answer 4

anion

Question 5

atoms share electrons to attain the electron configuration of noble gasses

Answer 5

octet rule

Question 6

negative ion formed when a halogen atom gains an electron (F- Cl- Br- I-)

Answer 6

halide ion

Question 7

compound made from cations and anions

Answer 7

ionic compound

Question 8

transfer of electrons from metals to nonmetals, formation of cations & anions

Answer 8

ionic bond

Question 9

shows number of atoms of each element in the smallest representative unit of a substance

Answer 9

chemical formula

Question 10

lowest whole-number ratio of ions in an ionic compound

Answer 10

formula unit

Question 11

number of ions of opposite charge that surrounds the ion in a crystal

Answer 11

coordination number

Question 12

forces of attraction between the free-floating valence electrons and the (+) charged metal cations

Answer 12

metallic bond

Question 13

mixture of two or more elements that contain at least one metal — properties are often superior to those of their component elements

Answer 13

alloy

Question 14

sharing of electrons between 2 nonmetals

Answer 14

Covalent Bond

Question 15

neutral group of atoms held together by covalent bonds

Answer 15

Molecule

Question 16

molecule that contains 2 atoms

Answer 16

Diatomic Molecule

Question 17

shows how many atoms of each element a substance contains

Answer 17

Molecular Formula

Question 18

reflects that simplest whole number ratio of atoms in a compound (aka divide the subscripts of the molecular formula by 2 bunch of times possible)

Answer 18

Empirical Formula

Question 19

1 pair of electrons shared between atoms

Answer 19

Single Bond

Question 20

2 pairs of electrons shared between atoms

Answer 20

Double Bond

Question 21

3 pairs of electrons shared between atoms

Answer 21

Triple Bond

Question 22

when a shared electron comes from a single atom to help the other fill the octet rule

Answer 22

Coordinate Covalent Bond

Question 23

single pair of electrons that do not share a bond with another atom

Answer 23

Unshared Electron Pair (Lone Pair)

Question 24

energy needed to break bond between two covalently bonded atoms

Answer 24

Bond Dissociation Energy (kJ/mol)

Question 25

structures that occur when possible to draw two or more valid electron structures that have the same number of electron pairs for a molecule or ion

Answer 25

Resonance Structure

Question 26

orbitals that apply to an entire molecule when atomic orbitals overlap

Answer 26

Molecular Orbital

Question 27

can be occupied by two electrons of a covalent bond

Answer 27

Bonding Orbital

Question 28

symmetric around axis

Answer 28

Sigma Bond

Question 29

region above the axis and another below it

Answer 29

Pi Bond

Question 30

bonded angles represent distance between electrons, unshared pairs take up more space than bonded pairs

Answer 30

VSEPR Theory

Question 31

equal sharing of electrons

Answer 31

Nonpolar Covalent Bond

Question 32

unequal sharing of electrons

Answer 32

Polar Covalent Bond

Question 33

molecule with separate charges (one side negative, one side positive)

Answer 33

Polar Molecule

Question 34

molecule that has two poles, or regions with opposite charges

Answer 34

Dipole

Question 35

two weakest intermolecular forces

Answer 35

Van der Waals Forces

Question 36

attraction of oppositely charged regions of polar molecules

Answer 36

Dipole Interactions

Question 37

electron motion on one molecule affecting the electron motion on then other (weakest)

Answer 37

Dispersion Forces

Question 38

attractive forces in which a hydrogen atom covalently bonded to a very electromagnetic atom (N, O, F) is also weakly bonded to an unshared electron pair or another electromagnetic atom

Answer 38

Hydrogen Bonding