This question has two parts.

Two students make models of two elements and label them Element X and Element Y.

Element X.
Element Y.

Part A
Which statement is true of the two elements' reactivity?

Both are chemically reactive.

Both are chemically nonreactive.

Element X is more chemically reactive than Element Y.

Element Y is more chemically reactive than Element X.

Part B
Which statement serves as evidence to support the answer to Part A?

Both models show two shells surrounding the nucleus.

Both models show ten neutrons in the nucleus.

Element X has seven electrons in its outer shell.

Element Y has an even number of protons and neutrons.


Type the answer to Part A and then Part B in the text box below.