Which is the smaller atom, potassium or calcium?

The symbol "Rn" represents what element?

Moving from top to bottom in Group 18 of the periodic table, the size of the atoms of the noble gases__________. A) increases B) decreases C) stays about the same D) shows no trend

A horizontal row on the periodic table is called A) a period B) a group C) a family D) a series

What is the element found in the periodic table in group 4 and period 6? A) hafnium B) selenium C) gadolinium D) chromium

The symbol "Ba" represents what element?

The symbol "K" represents what element?

Group 1 on the periodic table (excluding hydrogen) is known as the A) alkali metals B) alkaline earth metals C) transitional metals D) noble gases

What is the correct number of neutrons in an atom of Cr? A) 30 B) 54 C) 24 D) 36

The symbol "Bk" represents what element?

In the box above the number 31 represents the A) atomic number B) mass number C) atomic mass D) number of neutrons

An atom of titanium has a mass number of 48 and an atomic number of 22. A second titanium atom could have the following number of subatomic particles: A) 26 p, 22 e, 22 n B) 21 p, 21 e, 26 n C) 22 p, 22 e, 24 n D) 22 p, 26 e, 22 n

Gallium has how many neutrons? A) 28 B) 34 C) 39 D) 3 E) 31