Building Blocks of Matter

If carbon has a mass of 12.010 amu, then 6.005 grams of carbon contains
1. 1 atom of oxygen
2. 2 atoms of carbon
3. 0.500 moles of carbon
4. 1 mole of carbon
The atomic number of neon is 10. The atomic number of calcium is 20. Compared with a mole of neon, a mole of calcium contains
1. 20 times as many atoms
2. half as many atoms
3. an equal number of atoms
4. twice as many atoms
Cobaltl-59 (atomic number 27) has how many neutrons?
1. 28
2. 88
3. 32
4. 60
A berylium atom has an atomic number of 4 and mass number of 9. It has
1. 5 protons, 5 electrons, and 4 neutrons
2. 9 protons, 9 electrons and 4 neutrons
3. 4 protons, 4 electrons, and 13 neutrons
4. 4 protons, 4 electrons, and 5 neutrons
A neutral oxygen atom (atomic number 8) has
1. 4 protons and 4 electrons
2. 8 protons
3. 4 protons and 4 neutrons
4. 4 electrons and 4 neutrons
A chlorine isotope contains 17 protons, 17 electrons, and 18 neutrons. What is its atomic number?
1. 52
2. 18
3. 35
4. 17
A chlorine isotope contains 17 protons, 17 electrons, and 18 neutrons. What is its mass number?
1. 52
2. 18
3. 35
4. 17
The relative atomic mass of an atom can be found by comparing the mass of the atom to the mass of
1. its natually occuring isotopes
2. a proton
3. one atom of H-1
4. one atom of C-12
The atomic number of nitrogen, 7, indicates that there are seven
1. energy levels in the oxygen atom's nucleus
2. oxygen nuclides
3. neutrons soutside the nitrogen atom's nucleus
4. protons in the nucleus of a nitrogen atom
Protons and nuetrons strongly attract when they
1. have opposite charges
2. are very close together
3. are at high energies
4. are moving fast
In Rutherford's experiments, a few of the charged particles bounced back from the foil. He concluded that such particles must be
1. repelled by denselypacked regions of positive charges
2. indivisible
3. magnetic
4. striking electrons
When an electrical current passed through a glass tube, a paddle wheel placed between the electrondes moved. What conclusion was made?
1. atoms were indivisible
2. particles were passing from the cathode to the anode
3. there was gas in the tube
4. a magnetic field was produced
Experiments with cathode ray tubes led to the discovery of the
1. electron
2. nucleus
3. neutron
4. proton
An alpha particle consists of
1. one proton
2. two protons and two neutrons
3. one electron
4. pure energy
Which of the following represents the minimum required to shield from beta radiation?
1. one foot of lead
2. 2 inches of lead
3. thick clothing
4. bare skin
Which of the following represents about the minimum required to shield an alpha particle?
1. bare skin
2. 2 inches of lead
3. one foot of lead
4. thick clothing
Which of the following represents about the minimum needed to shield a gamma particle?
1. bare skin
2. several inches of lead
3. thick clothing
4. a sheet of paper
A beta particle consists of what type of particle ejected from the nucleus?
1. an electron
2. two protons and two neutrons
3. a proton
4. a neutron
In oxides of sulfer, atoms of sulfer combine with atoms of oxygen in small, whole-number ratios. This supports the law of
1. mass action
2. multiple proportions
3. conservation of energy
4. conservation of mass
If 4 grams of element "A" react with 10 grams of element "B", how many grams of "A" will react with 50 grams of "B"?
1. 14 g
2. 10 g
3. 20 g
4. 40 g
If each atom of element "D" has 4 mass units and each atom if element "E" has 8 mass units, a chemical molecule composed of one atom each of "D" and "E" has
1. 32 mass units
2. 48 mass units
3. 12 mass units
4. 2 mass units
Potassium has a molar mass of 39.10 g/mol. What is the mass of 9.00 mol of potassium?
1. 4.344 g
2. 39.10 g
3. 9 g
4. 352 g
THe molar mass of oxygen is 16.00 g/mol. What is the mass of 5 mol of oxygen?
1. 80.0 g
2. 0.312 g
3. 3.2 g
4. 16 g
The molar mass of helium is 4.00 g/mol. What is the number of moles of helium in 10.0 g of helium?
1. 40 mol
2. 2.50 mol
3. 0.40 mol
4. 10.0 mol
The region occupied by electrons in an atom is referred to as the
1. exterior portion
2. nucleus
3. nucleolus
4. electron cloud
Most of the mass of the atom is contained in
1. the electron cloud
2. the nucleus
3. the radius
4. the ulna
Who is credited with the discovery of the nucleus?
1. Rutherford
2. Bohr
3. Crookes
4. Thompson
Who is credited with the discovery of the electron?
1. Rutherford
2. Bohr
3. Thompson
4. Avogadro
What is the current model of the atom known as?
1. The Bohr model
2. The Quantum model
3. The Rutherford model
4. The Atomic model
Experiments with gold foil and alpha particles led to the discovery of
1. the electron
2. the neutron
3. the proton
4. the nucleus
Who developed the law of multiple proportions?
1. Proust
2. Lavoisier
3. Avogadro
4. Dalton
Who developed the law of definite proportions?
1. Proust
2. Lavoisier
3. Avogadro
4. Dalton
Who first correctly explained the the theory of burning (leading to the law of conservation of mass)?
1. Proust
2. Lavoisier
3. Avocado
4. Dalton
Who first theorized that all matter is composed of tiny particles called atoms?
1. Dalton
2. Bohr
3. Avogadro
4. Democritus
Which of the following parts of Dalton's theory still hold true?
1. Atoms of any one element differ in properties from atoms of another element
2. Atoms of a given element are identical in size, mass, and other properties
3. Atoms cannot be subdivided, created or destroyed
4. Atoms are chemically combined, separated or rearranged in physical reactions.
What is used to express the stability of radioactive substances?
1. radiation readings
2. shielding power
3. radioactive decay
4. half-life
24 grams of carbon contains how many moles?
1. 24
2. 12
3. 2
4. 48
10.0 moles of sodium contains how many grams?
1. 2.3 g
2. 23 g
3. 230 g
4. 0.43 g
How many moles of aluminym exist in 100.0 g of aluminum?
1. 0.27 mol
2. 0.13 mol
3. 7.69 mol
4. 3.706 mol
What is the mass of 14.5 mol of copper?
1. 4.38 g
2. 420.5 g
3. 0.50 g
4. 921 g

Building Blocks of Matter

Multiple-Choice ExerciseContent © 2006 Melanie Cecere; Authors of Activity: Melanie Cecere & Tami Maloney; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.

If carbon has a mass of 12.010 amu, then 6.005 grams of carbon contains

The atomic number of neon is 10. The atomic number of calcium is 20. Compared with a mole of neon, a mole of calcium contains

Cobaltl-59 (atomic number 27) has how many neutrons?

A berylium atom has an atomic number of 4 and mass number of 9. It has

A neutral oxygen atom (atomic number 8) has

A chlorine isotope contains 17 protons, 17 electrons, and 18 neutrons. What is its atomic number?

A chlorine isotope contains 17 protons, 17 electrons, and 18 neutrons. What is its mass number?

The relative atomic mass of an atom can be found by comparing the mass of the atom to the mass of

The atomic number of nitrogen, 7, indicates that there are seven

Protons and nuetrons strongly attract when they

In Rutherford's experiments, a few of the charged particles bounced back from the foil. He concluded that such particles must be

When an electrical current passed through a glass tube, a paddle wheel placed between the electrondes moved. What conclusion was made?

Experiments with cathode ray tubes led to the discovery of the

An alpha particle consists of

Which of the following represents the minimum required to shield from beta radiation?

Which of the following represents about the minimum required to shield an alpha particle?

Which of the following represents about the minimum needed to shield a gamma particle?

A beta particle consists of what type of particle ejected from the nucleus?

In oxides of sulfer, atoms of sulfer combine with atoms of oxygen in small, whole-number ratios. This supports the law of

If 4 grams of element "A" react with 10 grams of element "B", how many grams of "A" will react with 50 grams of "B"?

If each atom of element "D" has 4 mass units and each atom if element "E" has 8 mass units, a chemical molecule composed of one atom each of "D" and "E" has

Potassium has a molar mass of 39.10 g/mol. What is the mass of 9.00 mol of potassium?

THe molar mass of oxygen is 16.00 g/mol. What is the mass of 5 mol of oxygen?

The molar mass of helium is 4.00 g/mol. What is the number of moles of helium in 10.0 g of helium?

The region occupied by electrons in an atom is referred to as the

Most of the mass of the atom is contained in

Who is credited with the discovery of the nucleus?

Who is credited with the discovery of the electron?

What is the current model of the atom known as?

Experiments with gold foil and alpha particles led to the discovery of

Who developed the law of multiple proportions?

Who developed the law of definite proportions?

Who first correctly explained the the theory of burning (leading to the law of conservation of mass)?

Who first theorized that all matter is composed of tiny particles called atoms?

Which of the following parts of Dalton's theory still hold true?

What is used to express the stability of radioactive substances?

24 grams of carbon contains how many moles?

10.0 moles of sodium contains how many grams?

How many moles of aluminym exist in 100.0 g of aluminum?

What is the mass of 14.5 mol of copper?

Multiple-Choice Exercise
Content © 2006 Melanie Cecere; Authors of Activity: Melanie Cecere & Tami Maloney; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.