The Structure of the Atom

Question 1

Boron occurs naturally as two isotopes. What is the difference between these isotopes?

Revolt · Accepted Answer

They have different numbers of neutrons and different mass numbers.

Question 2

The diagram below shows some subatomic particles.What is the particle that is labeled with a question mark (?) in the diagram?

Revolt · Accepted Answer

quark

Question 3

The table below gives some characteristics of element Y.Characteristics of element YValuesMass number11Number of neutrons in a single atom6Average atomic mass (grams/mole)10.81What is the identity of element Y?

Revolt · Accepted Answer

B

Question 4

A particle that travels around the nucleus of an atom in orbitals is called a(n)

Revolt · Accepted Answer

electron.

Question 5

The table below gives the atomic mass and relative abundance values for the three isotopes of element M.Relative abundance (%)Atomic mass (amu)78.9923.985010.0024.985811.0125.9826What is the average atomic mass (in amu) of element M?

Revolt · Accepted Answer

24.30

Question 6

Which two particles are found in the nucleus of an atom?

Revolt · Accepted Answer

protons and neutrons

Question 7

Which statement describes an electron?

Revolt · Accepted Answer

It has a negative charge and is located in orbitals around the nucleus.

Question 8

An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass?

Revolt · Accepted Answer

the proton and the neutron

Question 9

A lithium atom has three protons, three neutrons, and three electrons. What is the overall charge on this atom?

Revolt · Accepted Answer

0

Question 10

A scientist uses an accelerator and high energy electrons to study the particles inside the protons of a helium atom. What particles is the scientist studying?

Revolt · Accepted Answer

the He quarks

The Structure of the Atom Answers

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