1.What element is located at period 3, group 13?

2.Element at group 4, period 5?

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

There are main groups in the modern periodic table of elements

What is the percentage composition of carbon in the compound ch4