Science Ch. 8

Question 1

True or False: Atoms of different elements have different numbers of protons

Answer 1

True

Question 2

True or False: To become more chemically stable, an atom that had two electrons in its outer energy level will gain 2 electrons

Answer 2

False

Question 3

True or False: Nonpolar molecules have a slight negative charge on one end and a slight positive charge on the other

Answer 3

False

Question 4

Why is water a noncovalent bond?

Answer 4

Water is two nonmetal atoms which share electrons, forming a molecule.

Question 5

Dot diagrams are used to represent _______.

Answer 5

Outer electrons

Question 6

The energy levels of an atom are occupied by _______.

Answer 6

Electrons

Question 7

Aluminum oxide is a chemical formula with two aluminum atoms and three oxygen atoms. Which is the correct chemical formula?

Answer 7

Al²O³

Question 8

The number of electrons in the second energy level of an atom

Answer 8

8

Question 9

Aspartame is an artificial sweetener, its formula being C¹³H¹⁶N²O⁵. Which of all these elements has the greatest quantity??

Answer 9

Hydrogen

Question 10

A type of atom that has lost or gained electrons

Answer 10

Ion

Question 11

Atoms that gain electrons become ions with a _______ charge

Answer 11

NEGATIVE (u better know this, we better not fail)

Question 12

The particle of glucose, 2C⁶H¹²O⁶ contains ___ atoms

Answer 12

48

Question 13

The molecule alanine, C³H⁷NO² contains _____ amount of different elements

Answer 13

4

Question 14

The compound 2Fe²O³ is made of __ different elements

Answer 14

2

Question 15

When Ba+2 binds with OH-, the compound ____ forms

Answer 15

BaF²

Question 16

When Mg+2 binds with OH-, the compound _____ forms

Answer 16

Mg(OH)²

Question 17

When Pb+4 binds with SO4-², the sompound _____ forms.

Answer 17

Pb(SO4)2

Question 18

Charged atom that has gained one or more electrons

Answer 18

Negative Ion

Question 19

Bond that holds a positive metal ion and negative nonmetal ions together

Answer 19

Ionic Bonds

Question 20

The thing that represents an element

Answer 20

Symbol

Question 21

Represents the number of atoms in a chemical formula

Answer 21

Subscript

Question 22

A charged atom that has lost one or more electrons

Answer 22

Positive ion

Question 23

Bond that holds nonmetal atoms together by sharing electrons

Answer 23

Covalent Bonds

Question 24

Bond that holds atoms together by sharing pooled valence electrons

Answer 24

Metallic Bond

Question 25

Find nitrogen’s (atomic number 7) Valence electrons, make a Lewis Dot Diagram, and identify the appropriate reaction

Answer 25

VE: 5 LDD: N with 5 dots around it Rxn: gain 3 electrons

Question 26

To find valence electrons, make a Bohr model, the last energy level, the quantity of electrons = valence electrons

Answer 26

Alrr, I’ll remember, (we better, don’t be a failure :))