Question: negatively charged, subatomic particles =

Answer: electrons

Question: elements that are malleable, polish to a luster, conduct heat and electricity well and tend to lose electrons in a chemical reaction =

Answer: metals

Question: a horizontal row on the periodic table =

Answer: period

Question: two or more elements that have chemically combined =

Answer: compound

Question: a homogeneous mixture whose particles are too small to reflect or scatter light =

Answer: solution

Question: positively charged, subatomic particles found in the nucleus of the atom =

Answer: protons

Question: a vertical column on the periodic table =

Answer: group

Question: elements with properties intermediate between those of metals and nonmetals =

Answer: metalloids

Question: Which scientist first made a model of the atom called the plum pudding model?

Answer: J.J Thomson

Question: The findings of Henri Becquerel and the Curies helped to discredit what notion held for a very long time?

Answer: That matter is indivisible and indestructible.