EH Y8EW RETRIEVAL QUIZ

Sodium atoms have an atomic number of 11. What is the correct electron configuration for a sodium atom?

• 2,9

• 5,6

• 2,8,1

• 8,2,1

An alternative solvent to water for using in chromatography is...

• milk

• cooking oil

• ethanol

• vinegar

What is the definition of atomic number?

• number of neutrons

• number of protons

• number of protons + number of neutrons

• number of electrons

What part of a cell is this?

• nucleus

• cytoplasm

• mitochondria

• ribosomes

What is a substance made only of one type of atom?

In physics, a turning force is called a...

During chromatography, why should the base line be drawn in pencil?

• it is easier to see

• it is insoluble so will not run

• it dissolves and becomes invisible when wet

• it moves up the paper faster than ink

How can we work out the number of neutrons in an atom?

• Halve the atomic mass.

• Add the atomic mass and atomic number together.

• Substract the atomic number from the atomic mass.

• Count the electrons because they are the same.

How many electrons can fit on the second orbit of an atom?

• 8
• 6
• 4
• 2

Which statement is NOT true.

• Lamp 3 is the brightest.

• When switch 2 closes, the ammeter reading goes up.

• When switch 2 closes, lamp 1 is brighter than lamp 2.

• Lamp 3 is in series with lamps 1 and 2.