The positively charged particle in the nucleus of an atom is the 1. neutron 2.magnetron 3.electron 4.proton

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

In which reaction is precipitation occurring?

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?