Atomic Structure

What is the core of the atom called?

• nucleatoid

• brain

• nucleus

• nucloid

What is the name of the positively charged particle that has a amu of 1 called?

• positron

• proton

• electron

• neutron

what charge does an atom have overall?

• positive

• negative

• none

which of the following is correct?

• the number of positive charges is equal to the number of neutral charges

• an atom is neutral because the number of negative charges is equal to the number of positive charges

what charge does the nucleus have ?

• none

• negative

• positive

what is the electron arrangement of sodium?

• 2,8

• 2,4

• 2,8,7

• 2,8,1

What group does chlorine belong to ?

• alkali metals

• transition metals

• halogens

• noble gases

Which one is very unreactive?

• helium

• fluorine

• sodium

• calcium

what is the chemical formula for carbon monoxide

• CO2

• CO

• CO3

What is the valency for oxygen?

• 2

• 4

• 6

• 8