The periodic table

2. Argon, Ar, has a higher relative atomic mass than potassium, K, but appears before it in the Periodic Table.

3. Why is argon listed before potassium in the Periodic Table?

• A. Argon has fewer neutrons than potassium.

• B. Argon has fewer protons than potassium.

• C. Argon has more neutrons than potassium.

• D. Argon has more protons than potassium.

5. Which statement about the elements in Group I is correct?

• 5. A. Hydrogen is evolved when they react with water.

• 5. B. Ions of Group I elements have a –1 charge.

• 5. C. Sodium is more reactive than potassium.

• 5. D. Solid sodium is a poor electrical conductor.

In the outline of the Periodic Table below, some elements are shown as numbers.

Which two numbers are metals in the same period?

• A. 1 and 2

• B. 1 and 7

• C. 3 and 5

• D. 5 and 6

Element X is a non-metal.

In which position of the Periodic Table could element X be found?

• A. at the bottom of Group I

• B. at the top of Group 0

• C. at the top of Group II

• D. in the transition elements

9. W, X, Y and Z are elements in the same period in the Periodic Table. W and Y are metals. X and Z are non-metals. Which shows the correct order of these elements across the period?

• A

• B

• C

• D

What determines the order of elements on today's periodic table?

• increasing atomic mass

• decreasing atomic mass

• increasing atomic number

• decreasing atomic number

From this element key of Nitrogen, determine the atomic mass of nitrogen

• 7

• 7.01

• 14.01

• 21.01

Look at the periodic table. Which list of elements forms a group on the periodic table?

• Li, Be, B, C, N, O, F, and Ne

• He, Ne, Ar, Kr, Xe, and Rn

• B, Si, As, Te, and At

• Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Ni, and Zd

Which is NOT a property of metals?

• brittleness

• conductivity

• ductility

• luster

Where are most metals on the periodic table?

• on the left side only

• on the right side only

• in the middle only

• on the left side and in the middle