09m Midterm

Last updated almost 5 years ago

37 questions

1

4

1

Library

09m Midterm

Last updated almost 5 years ago

37 questions

MIDTERM TEST Let's see what you remember or can unearth from your memory banks. Do your best to imagine me over your shoulder asking you where you can find that information, then look there.

Matter

1

Atomic structure

1

What is the mass number of an hydrogen atom that has one proton and two neutrons?

1

How many electrons does nitrogen have?

1

Electron configurations

1

At most, how many electrons can occupy each orbital?

4

Draggable item		Corresponding Item

4

Draggable item		Corresponding Item

1

Periodic Table and Trends

1

What is the value for the first ionization energy for aluminum?

MIDTERM TEST Let's see what you remember or can unearth from your memory banks. Do your best to imagine me over your shoulder asking you where you can find that information, then look there.

Matter

Which of the following is NOT a pure substance?

milk

carbon dioxide

What type of matter is carbon dioxide?

heterogeneous mixture

compound

element

What type of matter is silver?

homogeneous mixture

element

compound

A material that is malleable and conducts electricity is most likely...

metal.

motor oil.

wood.

Which substance in the table has a melting point closest to room temperature (20 oC)?

acetic acid

hydrogen

water

Which substance in the table has the largest range as a liquid?

acetic acid

nitrogen

table salt

Which of the following is a physical change?

burning a piece of wood

a copper roof changing color from red to green

sawing a piece of wood in half

Which is evidence of a chemical change?

a gas forms when vinegar and baking soda are mixed

iron changes color when heated

balls of wax form when melted wax is poured into ice water

Is the following statement true or false? Every sample of a pure stubstance has exactly the same composition and the same properties.

true

false

Classify the following substance as homogeneous or heterogeneous mixture. Salsa

homogeneous

heterogeneous

Atomic structure

Who provided the first evidence that atoms contain subatomic particles

Dalton

Thomson

Bohr

Almost all the mass of an atom is located in its

protons

nucleus

electron cloud

In the atom below, what number identifies the protons?

1

2

3

4

What is the particle with a negative 1 (-1) charge?

proton

electron

neutron

Two atoms with the same number of protons but a different number of neutrons are called...

ions.

isotopes.

alpha particles.

How many protons are there in a 25Mg atom?

13

12

25

What is the mass number of an hydrogen atom that has one proton and two neutrons?

How many protons does aluminum have?

26

13

14

What is the name of an atom with 12 protons and 11 neutrons?

sodium-23

sodium

magnesium-23

How many electrons does nitrogen have?

Change in which particle causes the element to change into a different element?

electron

proton

neutron

Which answer correctly identifies the number of protons, neutrons and electrons in the following atom? ⁷³As

33 protons, 33 electrons, and 40 neutrons

42 protons, 33 electrons, and 33 neutrons

75 protons, 33 electrons, and 40 neutrons

Electron configurations

As a consequence of the discovery by Rutherford, which model of the atoms is currently believed to be true?

a model in which the protons, electrons, and neutrons are evenly distributed throughout the volume of the atom

a model in which the nucleus is made of protons, electrons, and neutrons

a model in which the region outside the nucleus is largely empty space in which the electrons are located

What are energy sublevels?

only those energy levels that overlap others

multiple energy levels of any magnitude within an energy level

multiple orbitals of specific magnitude within an energy level

What are the correct names of the different sublevels found in the quantum model?

n, l, m, p

s, p, d, f

sphere, phase, donut, glass

If an atom has 3 energy levels, how many sublevels should it have?

1

2

3

At most, how many electrons can occupy each orbital?

Match the following sublevels with the corresponding maximum number of electrons possible

Draggable item		Corresponding Item
p		2
d		6
f		10
s		14

Match the following sublevels with the number of orbitals in each.

Draggable item		Corresponding Item
p		1
f		3
s		5
d		7

What is the electron configuration for strontium?

1s2 2s2 2p6 3s2 3p6 3d3 4s2

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2

What is the electron configuration for strontium?What element is represented by the following e.c.? 1s2 2s2 2p6 3s2 3p2

Se

Si

Mg

Periodic Table and Trends

How many valence electrons are there in a silicon atom?

1

2

4

Which atom has the largest atomic radius?

K

Ca

Kr

The energy needed to remove an electron from an atom is called __________ energy.

ionization

ejection

valence

Which is easier to remove an electron from?

sodium, Na

aluminum, Al

Which of the following elements has the highest electronegativity?

chlorine

fluorine

carbon

What is the value for the first ionization energy for aluminum?

Which of the following is NOT a pure substance?

milk

carbon dioxide

What type of matter is carbon dioxide?

heterogeneous mixture

compound

element

What type of matter is silver?

homogeneous mixture

element

compound

A material that is malleable and conducts electricity is most likely...

metal.

motor oil.

wood.

Which substance in the table has a melting point closest to room temperature (20 oC)?

acetic acid

hydrogen

water

Which substance in the table has the largest range as a liquid?

acetic acid

nitrogen

table salt

Which of the following is a physical change?

burning a piece of wood

a copper roof changing color from red to green

sawing a piece of wood in half

Which is evidence of a chemical change?

a gas forms when vinegar and baking soda are mixed

iron changes color when heated

balls of wax form when melted wax is poured into ice water

Is the following statement true or false? Every sample of a pure stubstance has exactly the same composition and the same properties.

true

false

Classify the following substance as homogeneous or heterogeneous mixture. Salsa

homogeneous

heterogeneous

Who provided the first evidence that atoms contain subatomic particles

Dalton

Thomson

Bohr

Almost all the mass of an atom is located in its

protons

nucleus

electron cloud

In the atom below, what number identifies the protons?

1

2

3

4

What is the particle with a negative 1 (-1) charge? 

proton

electron

neutron

Two atoms with the same number of protons but a different number of neutrons are called...

ions.

isotopes.

alpha particles.

How many protons are there in a 25Mg atom?

13

12

25

How many protons does aluminum have?

26

13

14

What is the name of an atom with 12 protons and 11 neutrons?

sodium-23

sodium

magnesium-23

Change in which particle causes the element to change into a different element?

electron

proton

neutron

Which answer correctly identifies the number of protons, neutrons and electrons in the following atom?  ⁷³As

33 protons, 33 electrons, and 40 neutrons

42 protons, 33 electrons, and 33 neutrons

75 protons, 33 electrons, and 40 neutrons

As a consequence of the discovery by Rutherford, which model of the atoms is currently believed to be true?

a model in which the protons, electrons, and neutrons are evenly distributed throughout the volume of the atom

a model in which the nucleus is made of protons, electrons, and neutrons

a model in which the region outside the nucleus is largely empty space in which the electrons are located

What are energy sublevels?

only those energy levels that overlap others

multiple energy levels of any magnitude within an energy level

multiple orbitals of specific magnitude within an energy level

What are the correct names of the different sublevels found in the quantum model?

n, l, m, p

s, p, d, f

sphere, phase, donut, glass

If an atom has 3 energy levels, how many sublevels should it have?

1

2

3

Match the following sublevels with the corresponding maximum number of electrons possible

p

2

d

6

f

10

s

14

Match the following sublevels with the number of orbitals in each.

p

1

f

3

s

5

d

7

What is the electron configuration for strontium?

1s2 2s2 2p6 3s2 3p6 3d3 4s2

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2

What is the electron configuration for strontium?What element is represented by the following e.c.?  1s2 2s2 2p6 3s2 3p2

Se

Si

Mg

How many valence electrons are there in a silicon atom?

1

2

4

Which atom has the largest atomic radius?

K

Ca

Kr

The energy needed to remove an electron from an atom is called __________ energy.

ionization

ejection

valence

Which is easier to remove an electron from?

sodium, Na

aluminum, Al

Which of the following elements has the highest electronegativity?

chlorine

fluorine

carbon