Question 1

Marie Curie suggested the name "radioactivity" to describe the spontaneous emission of particles and/or radiation.

Accepted Answer

Marie Curie did, in fact, suggest the name "radioactivity" to describe the phenomenon she was studying.

Question 2

The number of neutrons in all atoms of an element is the same.

Accepted Answer

The number of neutrons in an atom can vary within the same element, resulting in isotopes. Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 3

Write the formula for the acid formed from the hydrogen sulfate anion, and then name the acid.

Accepted Answer

The answer of Write the formula for the acid formed...

Question 4

The proton is about 1840 times heavier than the electron.

Accepted Answer

This statement is true. The mass of a proton is approximately 1.6726 x 10^-27 kg, while the mass of an electron is approximately 9.1094 x 10^-31 kg. Dividing the mass of a proton by the mass of an electron, we get a ratio of approximately 1836, or about 1840 when rounded.

Question 5

Write the formula of lead(II)chloride.

Accepted Answer

The answer of Write the formula of lead(II)chloride....

Question 6

Define allotrope.

Accepted Answer

The answer of Define allotrope....

Question 7

Name the following compound: Mg(NO₃)₂.

Accepted Answer

The answer of Name the following compound: Mg(NO₃)₂....

Question 8

When a beam of alpha particles passes between two electrically charged plates, the beam is deflected toward the positive plate.

Accepted Answer

The answer of When a beam of alpha particles passes...

Question 9

What are isotopes?

Accepted Answer

The answer of What are isotopes?...

Question 10

Write the formula of calcium carbonate.

Accepted Answer

The answer of Write the formula of calcium carbonate....

Question 11

The elements known as the halogens are useful as disinfectants. Name two halogens.

Accepted Answer

The answer of The elements known as the halogens are...

Question 12

Name the following compound: KCl.

Accepted Answer

The answer of Name the following compound: KCl....

Question 13

Write the formula of ammonium chlorate.

Accepted Answer

The answer of Write the formula of ammonium chlorate....

Question 14

Almost all the mass of an atom is concentrated in the nucleus.

Accepted Answer

The nucleus contains protons and neutrons, which together make up almost all of the mass of an atom.

Question 15

Write the formula for the acid formed from the permanganate anion, and then name the acid.

Accepted Answer

The answer of Write the formula for the acid formed...

Question 16

The atomic number is equal to the number of protons in the nucleus of each atom of an element.

Accepted Answer

The atomic number is defined as the number of protons in the nucleus of an atom, so it is true that the atomic number is equal to the number of protons in each atom of an element.

Question 17

Name the following compound: NaNO₂.

Accepted Answer

The answer of Name the following compound: NaNO₂....

Question 18

The formula for isopropyl alcohol is sometimes written as (CH₃)₂CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?

Accepted Answer

The answer of The formula for isopropyl alcohol is sometimes...

Question 19

Using a cathode ray tube, J. J. Thomson determined the magnitude of the electric charge on the electron.

Accepted Answer

J. J. Thomson determined the charge-to-mass ratio of the electron using a cathode ray tube, not the magnitude of the electric charge. The magnitude of the electric charge on the electron was later determined by Robert A. Millikan through the oil-drop experiment.

Question 20

Write the formula for the acid formed from the nitrite anion, and then name the acid.

Accepted Answer

The answer of Write the formula for the acid formed...

Quiz 2: Atoms, Molecules, and Ions

Marie Curie suggested the name "radioactivity" to describe the spontaneous emission of particles and/or radiation.

The number of neutrons in all atoms of an element is the same.

Write the formula for the acid formed from the hydrogen sulfate anion, and then name the acid.

The proton is about 1840 times heavier than the electron.

Write the formula of lead(II)chloride.

Define allotrope.

Name the following compound: Mg(NO3)2.

When a beam of alpha particles passes between two electrically charged plates, the beam is deflected toward the positive plate.

What are isotopes?

Write the formula of calcium carbonate.

The elements known as the halogens are useful as disinfectants. Name two halogens.

Name the following compound: KCl.

Write the formula of ammonium chlorate.

Almost all the mass of an atom is concentrated in the nucleus.

Write the formula for the acid formed from the permanganate anion, and then name the acid.

The atomic number is equal to the number of protons in the nucleus of each atom of an element.

Name the following compound: NaNO2.

The formula for isopropyl alcohol is sometimes written as (CH3)2CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?

Using a cathode ray tube, J. J. Thomson determined the magnitude of the electric charge on the electron.

Write the formula for the acid formed from the nitrite anion, and then name the acid.

Name the following compound: Mg(NO₃)₂.

Name the following compound: NaNO₂.

The formula for isopropyl alcohol is sometimes written as (CH₃)₂CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?