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Lesson: The Structure of the Atom

Worksheet • 22 Questions

Q1:

Which term is defined as the number of mutually orthogonal atomic orbitals possessing the same potential energy?

  • AOrbital degeneracy
  • BOrbital parity
  • COrbital angular momentum
  • DAzimuthal quantum number
  • EPrincipal quantum number

Q2:

An isotope has atomic number 26, mass number 58 and a charge of 2+.

How many protons does the isotope contain?

How many neutrons does the isotope contain?

How many electrons does the isotope contain?

What is the chemical symbol for this element?

  • A F e
  • B G e
  • C C r
  • D C e
  • E N i

Q3:

The structural formula of carbon dioxide is:

What is the empirical formula?

  • A C O 2
  • B C O
  • C C O 2 2
  • D C O 1 / 2

What is the molecular formula?

  • A C O 2
  • B C O
  • C C O 2 2
  • D C O 1 / 2

Q4:

Which term describes two atoms with different atomic numbers but the same number of neutrons?

  • AIsotones
  • BIsodiaphers
  • CIsotopes
  • DIsobars
  • ENuclear isomers

Q5:

Isotopes of an element always contain different numbers of which particles?

  • ANeutrons
  • BNuclei
  • CProtons
  • DPositrons
  • EElectrons

Q6:

An isotope has symbol 7 + L i .

How many protons does the isotope contain?

How many neutrons does the isotope contain?

How many electrons does the isotope contain?

Q7:

An ion contains 34 protons and 36 electrons.

What is the chemical symbol for this element?

  • A S e
  • B G e
  • C K r
  • D E r
  • E Y b

What is the charge of the ion?

  • A 2
  • B 1
  • C0
  • D1+
  • E2+

Q8:

What are the basic components of an atom?

  • AProtons, neutrons, and electrons
  • BProtons, neutrons, and electron neutrinos
  • CProtons, neutrinos, and electrons
  • DPhotons, neutrons, and electrons
  • EPhotons, neutrons, and electron neutrinos

Q9:

Which of the following properties cannot vary between isotopes of the same element?

  • AAtomic number
  • BBinding energy
  • CNucleon number
  • DMass number
  • ECharge

Q10:

An isotope has atomic number 53, mass number 127 and a charge of 1 .

How many protons does the isotope contain?

How many neutrons does the isotope contain?

How many electrons does the isotope contain?

What is the chemical symbol for this element?

  • A I
  • B T a
  • C W
  • D T e
  • E X e

Q11:

Protons and neutrons are examples of which type of particle?

  • ANucleon
  • BNucleus
  • CQuark
  • DNuclide
  • ELepton

Q12:

An ion of platinum has mass number 195 and contains 74 electrons.

How many protons does the ion contain?

How many neutrons does the ion contain?

What is the charge of the ion?

  • A4+
  • B2+
  • C0
  • D 2
  • E 4

Q13:

An isotope has symbol 1 5 3 N .

How many protons does the isotope contain?

How many neutrons does the isotope contain?

How many electrons does the isotope contain?

Q14:

Which of the following is the best definition of the wave function of an atomic orbital?

  • AA mathematical function describing the wave-like behavior of either one or a pair of electrons in an atom
  • BThe probability density of finding either one or a pair of electrons in the space around an atomic nucleus
  • CThe space around an atomic nucleus in which either one or a pair of electrons are most likely to be found
  • DA shell of electron density located at a fixed distance from an atomic nucleus, containing a maximum of two electrons
  • EA surface connecting points of equal electron density around an atomic nucleus, containing a maximum of two electrons

Q15:

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

  • AMass number
  • BNuclear mass
  • CRelative atomic mass
  • DMass excess
  • EAtomic number

Q16:

When the distance between atoms is less than the equilibrium bond length, the energy increases. What is the main cause of this effect?

  • ARepulsion between the positive nuclear charges
  • BThe Pauli exclusion principle
  • CRepulsion between electrons
  • DDistortion of the optimum orbital geometries
  • ECollision between nuclei

Q17:

An ion contains 13 protons and 10 electrons.

What is the chemical symbol for this element?

  • A A l
  • B C o
  • C L i
  • D V
  • E N e

What is the charge of the ion?

  • A3+
  • B 2
  • C0
  • D2+
  • E 3

Q18:

An ion has the electron configuration 1s2 2s2 2p6 3s2 3p6. Which of the following pieces of information would not allow this ion to be precisely identified?

  • AAtomic mass
  • BIonic radius
  • CAtomic number
  • DIonization energy
  • ECharge

Q19:

How many neutrons does the isotope 2 9 1 3 A l contain?

Q20:

An isotope has symbol 1 2 5 4 + T e .

How many protons does the isotope contain?

How many neutrons does the isotope contain?

How many electrons does the isotope contain?

Q21:

An isotope has symbol 1 0 9 A g .

How many protons does the isotope contain?

How many neutrons does the isotope contain?

How many electrons does the isotope contain?

Q22:

Which term is defined as the space around an atomic nucleus which, for an isolated atom, is occupied by all electrons possessing the same potential energy?

  • ASubshell
  • BLone pair
  • CShell
  • DCovalent bond
  • EOrbital
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