atomic size

What influences the atomic size of an atom across a period ?

• neutron number

• proton number

• electron number

• mass number

Which atom has a larger atomic radius based upon their relative positions on the periodic table?

• Sodium

• Argon

What is the definition of atomic radius?

• atomic radius is the distance between 2 bonded atoms

• atomic radius is the distance from the centre of nucleus to the outermost shell

• atomic radius is measured in mols

The distance between the nucleus of two nitrogen atom is 140pm. What is the atomic radius of a nitrogen atom?

• 140pm

• 700pm

• 70pm

• 280pm

The shielding effect is the attraction between?

• electrons and protons

• protons and nucleus

• nucleus and valence orbital

Which has more shielding?

• Cs

• K

Tags

NGSS.HS-PS1-1

What makes the atomic size increase down the group?

• The atoms have more mass

• The atoms have more protons

• The atoms have more shielding effect

• The atoms have more nuetrons

What will occur as we go down the group? (choose all answer that applies)

• Shielding effect increase

• Size of atom decrease

• The attraction between the nucleus and valence electrons decrease

• Shielding effect decrease

Tags

NGSS.HS-PS1-1

Who did not contribute to make a periodic table?

• Dohereiner

• Aristotle

• John Newland

• Dimitri Mendeleev