Chemistry Pre-test

1.

1 point

In the periodic table, elements with similar properties can be found in:

every second row

the same period

every fourth column

the same group

2.

1 point

The bromine atom gains an electron to form the bromide ion Br–. How many electrons does bromine have in its outer shell?

5

1

3

7

3.

1 point

The elements in the periodic table are organised on the basis of their:

mass number

melting point

boiling point

atomic number

4.

1 point

The nucleus of the atom contains:

neutrons and protons

electrons and neutrons

only protons

electrons and protons

5.

1 point

The elements in the first column of the periodic table react with water to form basic solutions and are called:

alkali metals

halogens

alkaline earth metals

noble gases

6.

1 point

Which statement is true about bromine?

is a liquid at room temperature.

is a good heat conductor.

is a metallic element.

tends to form Br+ ions readily.

7.

1 point

Isotopes are:

different atoms of the same element with a different number of electrons.

different atoms of the same element with different mass numbers

different atoms of the same element with a different number of protons.

8.

1 point

Covalent bonds are formed between atoms by:

the sharing of neutrons.

the attraction of ions.

the sharing of electrons.

the sharing of protons.

9.

1 point

The element chlorine is an example of:

a noble gas

an alkaline earth metal

a halogen

an alkali metal

10.

1 point

2, 8, 6 is the electron configuration of:

oxygen

sulfur

selenium

neon

11.

1 point

Most of the elements in the periodic table are:

metals

an alkali metal

metalloids

non-metals

12.

1 point

The atomic number is:

the number of electrons, neutrons and protons in an atom

the number of protons in an atom

the number of electrons in an atom

the number of neutrons in an atom

13.

1 point

Which of the following elements would be most likely to form an ion with a single positive charge?

Helium

Carbon

Sodium

Neon

14.

1 point

An element that belongs to period 5 of the periodic table is:

scandium

chromium

strontium

carbon

15.

1 point

The element that belongs to group 4 and period 5 of the periodic table is:

vanadium

silicon

zirconium

arsenic

16.

1 point

Which of the following is not a property of ionic compounds?

They are usually solids at room temperature.

They usually dissolve in water.

Their aqueous solutions are generally poor conductors of electricity.

They normally have high melting points.

17.

1 point

The atoms of the different ions that make up ionic compounds are held together by:

the sharing of electrons

electrostatic forces

magnetic forces

the force of gravity

18.

1 point

Select the statement that is true of lead.

The symbol for lead is L

plumbers get their name from the Latin word for lead

Lead is more reactive than iron in dilute hydrochloric acid

Lead is a member of period 7

19.

1 point

The set of elements that contains a metal, metalloid and non-metal (in any order) is:

carbon, silicon, oxygen.

fluorine, silicon, gold.

copper, germanium, boron.

sulfur, zinc, aluminium.

20.

1 point

An atom of the element magnesium contains 12 electrons. The arrangement of its electrons in shells can be written as:

2,2,8

2,8,2

2,2,2,2,2,2

2,4,6

21.

1 point

Which statement is not true about all metals?

They are solid at room temperature

They are good electrical conductors

They are lustrous

Solid metals are malleable

22.

1 point

One of the particles inside the atom is very much lighter than the others. It is the:

nucleus

proton

electron

neutron

23.

1 point

Mendeleev made predictions about an unknown element that he called eka-silicon. When this element was discovered in 1886 it was called:

gallium

polonium

aluminium

germanium

24.

1 point

Which of the following metals dissolves the fastest in dilute sulfuric acid?

zinc

iron

copper

Magnesium

25.

1 point

The elements helium and neon are both classified as:

an alkaline earth metal

noble gases

halogen

an alkali metal

26.

1 point

Which of the following elements is not a metalloid?

aluminium

arsenic

germanium

silicon

27.

1 point

An element that belongs to group 14 of the periodic table is:

oxygen

germanium

calcium

beryllium