2. Atoms & Elements

According to the table above, how many electrons are required to produce a charge of –2.0 C?

If the charge and mass of one proton is 1.60218 x 10^-19 C and 1.673 x 10^-24 g respectively, what is the charge of 378 kg of protons?

Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (b) Every atom of a given element has the same number of protons.

Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (a) The nucleus has most of the mass and comprises most of the volume of an atom.

Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (c) The number of electrons in an atom equals the number of neutrons in the atom.

Consider an atom of ¹⁰B. (c) What is the symbol of the atom obtained by adding one neutron to ¹⁰B?

Consider an atom of ¹⁰B. (b) What is the symbol of the atom obtained by adding one proton to ¹⁰B?

Consider an atom of ¹⁰B. (a) How many protons, neutrons, and electrons does this atom contain?

Consider an atom of ⁶³Cu. (a) How many protons, neutrons, and electrons does this atom contain?

(b) Which of these can vary without changing the identity of the element?

(a) Define atomic number and mass number.

How many protons, neutrons, and electrons are in the following atoms? (e) ¹⁸⁴W

How many protons, neutrons, and electrons are in the following atoms? (d) ⁸⁰Br

How many protons, neutrons, and electrons are in the following atoms? (c) ⁷⁰Ga

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ⁷⁹Br

Protons 25 82

Neutrons 30 64

Electrons 48 86

Mass no. 222 207

Complete the fifth row of the table.

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ⁷⁹Br

Protons 25 82

Neutrons 30 64

Electrons 48 86

Mass no. 222 207

Complete the third row of the table.

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ⁷⁹Br

Protons 25 82

Neutrons 30 64

Electrons 48 86

Mass no. 222 207

Complete the second row of the table excluding the row with isotope symbol.

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ¹¹²Cd

Protons 32 92

Neutrons 58 49

Electrons 38 36

Mass no. 81 235

Complete the third row of the table.

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ¹¹²Cd

Protons 32 92

Neutrons 58 49

Electrons 38 36

Mass no. 81 235

Complete the second row of the table.

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ¹¹²Cd

Protons 32 92

Neutrons 58 49

Electrons 38 36

Mass no. 81 235

Complete the first row of the table.

Which statements about subatomic particles are false? a. Protons and electrons have charges of the same magnitude but opposite sign. b. Protons have about the same mass as neutrons. c. Some atoms don't have any protons. d. Protons and neutrons have charges of the same magnitude but opposite signs.

Identify the element represented by each of the following symbols and give the number of protons and neutrons in each: (b) ¹²⁷₅₃X

Identify the element represented by each of the following symbols and give the number of protons and neutrons in each: (a) ⁷⁴₃₃X

Rounded to the nearest whole number, how many protons are in an atom of krypton?

Oxygen has an atomic number of 8. What can you conclude from this fact?

On the periodic table, gold has the atomic number 79. This means that

How many neutrons are in an atom of copper? Round your answer to the nearest whole number.

An atom of the isotope ¹³³Cs contains how many protons (p), neutrons (n), and electrons (e)?

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is ____.

The mass number of an atom is 15 and its atomic number is 7. the atom probably has...

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?

Using the periodic table, complete the table to describe each atom. Type in your answers.

Consider the following table showing symbols, the number of protons, electrons, and neutrons, and the mass number. Each column represents a neutral atom.

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Fill in the third column of this table.

Mercury is in the 80th position in the periodic table. how many protons does it have?

Which subatomic particles contribute to an atom's mass number but not its atomic number?

What type of atomic particles will you find inside of the nucleus of an atom?

What is the mass number of a potassium (K) atom that has 20 neutrons?

If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?

What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?

How many protons, neutrons, and electrons are there in a neutral atom of 43k (potassium-43)?

Rounded to the nearest whole number, how many electrons are in an atom of zirconium?

How many protons and neutrons does a nucleus designated as ⁴⁰₁₈X contain?

An atom's mass number is 13 and its atomic number is 6. How many neutrons are in its nucleus?

How many protons, neutrons, and electrons are there in a neutral atom of ⁹⁷Tc (Technetium-97)?

What is the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons?

Carbon has an atomic number of 6. What can you conclude about carbon from this fact?

Rounded to the nearest whole number, how many neutrons, on average, are in an atom of osmium?

Which term is defined as the sum of protons and neutrons in an atom?

In an electrically neutral atom the number of protons in the nucleus is equal to the number of?

The sum of the number of protons and neutrons in the nucleus of an atom is called the

Sodium's atomic number is 11. What does this tell you about an atom of sodium?

In which of these cases do we have enough information to say that the atom is electrically neutral?

The atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does it have?

The center of an atom is a dense region consisting of protons and neutrons called the

Which subatomic particle plays the greatest part in determining the properties of an element?

What is the mass number of a cobalt atom that has 27 protons and 30 neutrons?

Rounded to the nearest whole number, how many protons are in an atom of krypton? 36 48 84 120

Match each property to the appropriate subatomic particle. Drag each property into the correct bin.

An uncharged atom has six electrons. the nucleus of this atom must contain _______ protons.

Rounded to the nearest whole number, how many protons are in an atom of Krypton? 36 48 84 120

How many protons, neutrons, and electrons are there in a neutral atom of ³⁰P (phosphorus-30)?

An uncharged atom has six electrons. The nucleus of this atom must contain _______ protons.

For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?

If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is

All atoms of an element have the same number of ________.

What is the atomic mass number of carbon-13 (6 protons, 7 neutrons, 6 electrons)?

What is the mass number for an atom of barium containing 56 protons and 82 neutrons?

Which of the choices is the unique, defining property of atoms of a particular element?