Free Printable CHE142 Chapter 1

Worksheets

CHE142 Chapter 1

Total questions: 28

Worksheet time: 1hrs 18mins

Name

Class

Date

Which of the following statement is referring to Aufbau principle?

Only maximum of two electrons are allowed in one orbital and two electrons in the same orbital must have opposite spins.

Electrons is arranged from lowest energy level to highest energy level.

When more than one orbital has the same energy, Electrons occupy all the orbitals of a given subshell singly before pairing begins. These unpaired electrons have parallel spins

As n increases, the spacing between energy levels becomes smaller

This statement: When more than one orbital has the same energy, Electrons occupy all the orbitals of a given subshell singly before pairing begins. These unpaired electrons have parallel spins

is referring to which principle?

Aufbau

Hund

Pauli

3s has higher energy level than 3p. True or False?

True

False

Write the electron configuration for Fe

(a)

Write the electron configuration for Ca²⁺

(a)

Write the electron configuration for S^–

(a)

What atom would be expected to have a half-filled 4s subshell?

(a)

What elements generally make an ionic bond?

metal and nonmetal

2 nonmetals

metal

none of the above

What elements generally make a covalent bond?

metal and nonmetal

2 nonmetals

metal

none of the above

10.

In chemical compounds, covalent bonds form when

the electronegativity difference between two atoms is very large.

electrons are completely transferred between two metals.

pairs of electrons are shared between two nonmetal atoms.

two nonmetal atoms are attracted to each other by opposite charges.

11.

Predict the bond that will form between Be and F.

Ionic

Covalent

12.

Predict the bond that will form between Se and Cl

Ionic

Covalent

13.

How many electrons can the first energy level hold?

14.

The number of _____ is most important in determining how an atoms will bond.

Neutrons

Protons

Valence Electrons

Electron sin the innermost shell

15.

High Melting & Boiling Points

Ionic

Covalent

16.

Ionic bonds happen when valence electrons are

shared

too heavy

transferred

17.

Valence electrons are

neutral (no charge)

found in the outer most energy level of the atom

equal to the number of protons

18.

Is this molecule polar or non-polar?

Polar

Non-polar

19.

Is this molecule polar or non-polar?

Non-polar

Polar

20.

How many sigma and pi bonds does this have?

1 sigma and 1 pi

2 sigma and 1 pi

1 sigma and 2 pi

2 sigma and 2 pi

21.

Which of the following molecules are polar molecule? Can tick more than 1

HCl

H₂O

CH₄

NH₃

22.

Which of the following is a non-polar molecule?

$HCl$

$NH_3$

$CCl_4$

$H_2O$

23.

Which one has the highest boiling point?

CH₄

H₂O

SO_²

24.

Between HF and H₂O... which one has a higher boiling point?

H₂0

25.

Intermolecular forces for: NH₃

Dispersion Force

Dipole dipole

Hydrogen bonding

26.

Which guideline is violated in the following orbital diagrams?

Hund's

Aufbau's

Pauli's Exclusive

27.

What is incorrect about this orbital diagram?

Both arrows in the 2p box should be pointing up

There is nothing incorrect with this diagram

In the 2p box there should only be 1 electron in the first 2p box and one in the 2nd 2p box

All the arrows should be pointing up.

28.

This orbital diagram represents:

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CHE142 Chapter 1

Total questions: 28

Worksheet time: 1hrs 18mins

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