Question

test content
question 1
0.3 points
an atom with 10 protons and which has lost 2 electrons is electrically neutral.
a true
b false
clear selection
question 2
0.3 points
the symbol na* represents a sodium atom that has lost an electron.
a true
b false

Explanation:

Question 1

An electrically neutral atom has equal numbers of protons and electrons. If an atom has 10 protons and loses 2 electrons, it has \(10 - 2 = 8\) electrons. Since \(10
eq8\), the atom is not neutral. So the statement is false.

A sodium atom (\(Na\)) has 11 electrons. When it loses an electron, it becomes a sodium ion (\(Na^+\)) with a positive charge (since protons (11) now outnumber electrons (10)). So \(Na^+\) represents a sodium atom that lost an electron. The statement is true.

Answer:

B. False

Question 2