Ch 2_3

Ch 2_3

10th - 12th Grade

10 Qs

quiz-placeholder

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Ch 2_3

Ch 2_3

Assessment

Quiz

Chemistry

10th - 12th Grade

Medium

Created by

Castiel Zhang

Used 5+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which statement about the electrons in a ground state carbon atom is correct?

Electrons are present in four different energy levels.

There are more electrons in p orbitals than there are in s orbitals.

The occupied orbital of highest energy is spherical.

The occupied orbital of lowest energy is spherical.

2.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

An isolated gaseous atom of element X has paired electrons in at least one of its 3d orbitals and has a filled 4s subshell.

What could be the identity of element X?

iron

gallium

copper

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In which pair do the atoms contain the same number of neutrons?

11B and 12C

7Li and 9Be

24Mg and 28Si

14N and 16O

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which formula represents the empirical formula of a compound?

C2H4O

C2H4O2

C6H12

H2O2

5.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

In 2011 an international group of scientists agreed to add two new elements to the Periodic Table. Both elements had been made artificially and are called flerovium, Fl, and livermorium, Lv.

Fl proton number: 114 nucleon number: 289

Lv proton number: 116 nucleon number: 292

From the information about atoms in the table, which statements are correct?

One atom of Lv has one more neutron than one atom of Fl.

One Fl2– ion has the same number of electrons as one atom of Lv.

One Lv+ ion has the same number of electrons as one Fl ion.

6.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

The relative molecular mass, Mr, of a particular sample of chlorine is 72.0.

Which properties of the atoms in this sample will be the same for all of the atoms?

radius

nucleon number

isotopic mass

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Oxygen has three stable isotopes, 16O, 17O and 18O. All three isotopes are present in a sample of oxygen gas, O2, which was analysed using a mass spectrometer

How many peaks associated with the O2+ ion would be expected?

3

5

6

9

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