This question has two parts. Two students make models of two elements and label them Element X and Element Y.
Part A
Which statement is true of the two elements' reactivity?
A. Both are chemically reactive.
B. Both are chemically nonreactive.
C. Element X is more chemically reactive than Element Y.
D. Element Y is more chemically reactive than Element X.
Part B
Which statement serves as evidence to support the answer to Part A?
E. Both models show two shells surrounding the nucleus.
F. Both models show ten neutrons in the nucleus.
G. Element X has seven electrons in its outer shell.
H. Element Y has an even number of protons and neutrons.
