atomic structure and periodic table Questions Set 4

Which element has an atomic mass of 20?

• neon

• nickel

• nitrogen

• sodium

Which subatomic particles make up the mass of an atom?

• electrons and neutrons

• electrons and protons

• protons and neutrons

• protons, neutrons and electrons

Tags

NGSS.MS-PS1-1

Which of the following elements is the least reactive?

• bromine

• chlorine

• fluorine

• iodine

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many neutrons are there in an atom of potassium?

• 19

• 20

• 39

• 58

Which element is found in Group 2, period 2 of the periodic table?

• boron

• barium

• beryllium

• bismuth

The results of the alpha particle scattering experiment led to which conclusion being made?

• atoms are tiny spheres that cannot be divided

• negative electrons are embedded in a sphere of positive charge

• neutrons exist within the nucleus

• the mass of the atom is concentrated at the centre

Tags

NGSS.HS-PS1-8

Which of the following elements will not form positive ions when it reacts?

• chlorine

• lithium

• magnesium

• silver

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Copper exists naturally as two isotopes, 63Cu and 65Cu. The abundance of 63Cu is 69% and the abundance of 65Cu is 31%. What is the relative atomic mass of copper to 3 significant figures?

• 63.3

• 63.6

• 64.3

• 64.4

Which separation method would be used to separate an insoluble solid from a liquid?

• chromatography

• filtration

• fractional distillation

• simple distillation

How many electrons are required to fill the second energy level (shell) of an atom?

• 2

• 6

• 8

• 10