Midterm

Question 1

109g=____kg?
50cm=____m?
56500mm=____km?

Answer 1

109g=.109kg
50cm=.5m
56500mm=.056km

Question 2

8mm=____cm?
160cm=___mm?
6.3cm=____mm?

Answer 2

8mm=.8 cm
160cm=1600mm
6.3cm=63mm

Question 3

What is the mass of protons, neutrons, and electrons?

Answer 3

Protons and neutrons: 1 AMU

Electrons: 1/2000

Question 4

What is the charge of protons, neutrons, and electrons?

Answer 4

Protons:+
Neutrons:0
Electrons:-

Question 5

Where are protons, neutrons and electrons located?

Answer 5

Protons and neutrons: nucleus

Electrons: in orbit

Question 6

How do you determine if a substance will or will not float in water?

Answer 6

If the density is>1 is will sink, if it is

Question 7

How do you find the number of protons, neutrons and electrons in an atom?

Answer 7

Protons and electrons=atomic number

Neutrons= mass-atomic number

Question 8

What is an isotope?

Answer 8

Forms of an atom with differing numbers of neutrons(NOT protons or neutrons)

Question 9

What is the trend for atomic radius?

Answer 9

Increase going down, decrease going across

Question 10

What is the trend for ionic radius?

Answer 10

Increase going down, decrease going across

Question 11

What is the trend for electron affinity?

Answer 11

decrease going down, increase going across

Question 12

What is the trend for ionization energy?

Answer 12

decrease going down, increase going across

Question 13

How do positive and negative ions relate to the size of the atom and why?

Answer 13

Positive ions tend to be smaller than the parent atom because the have a stronger electron pull, and negative ions tend to be bigger than the parent atom because they have a weaker pull

Question 14

Why do elements on the left side of the periodic table tend to form positive ions and why do elements on the right side tend to form negative ions?

Answer 14

Elements on the left side have an easier time losing electrons and elements on the right side tend to gain electrons

Question 15

How do covalent bonds form compared to ionic bonds?

Answer 15

Ionic bonds include transfer of electrons and covalent bonds include sharing of electrons

Question 16

What are the characteristics of ionic bonds?

Answer 16

1. High melting and boiling points
2. soluable in water
3. conductors
4. Nonmetal+metal

Question 17

What are the characteristics of covalent bonds?

Answer 17

1. Nonmetal+nonmetal
2. Tend to be gases or liquids
3. Poor conductors
4. Low melting/boiling points
5. Polar/nonpolar

Question 18

How do you find the molecular formula of a substance?

Answer 18

Molecular weight\empirical weight

Question 19

What is the bond and chemical name of O3I2?

Answer 19

trioxygen diodide

Question 20

What is the bond and chemical name of Ti(OH)2?

Answer 20

Ionic, Titanium(II) Hydroxate

Question 21

What is the chemical name and formula of CF6?

Answer 21

Covalent, Carbon hexaflouride

Question 22

What is the chemical bond and name for K3PO3?

Answer 22

ionic, postassium phosphite

Question 23

What is the electron configuration for Cobalt?

Answer 23

{Ar} 4s2 3d7

Question 24

What is the electron configuration for Ar?

Answer 24

{Ar}

Question 25

What is the electron configuration for Polonium?

Answer 25

{Xe} 6s2 5d1 4f14 5d9 6p4

Question 26

What is the difference between compounds, elements, and mixtures?

Answer 26

Elements-cannot be broken down further

Compounds- broken down by chemical methods

Mixtures- separated using physical methods