1-6-1. Which of the following is a metalloid?
A. Potassium, B. Silicon, C. Iron, D. Helium
1-6-2. Which of the following elements is a transition metal?
A. silicon, B. lead, C. sodium, D. chromium
1-6-3. Which of the following elements is a post-transition metal?
A. silicon, B. lead, C. sodium, D. chromium
1-6-4. Which of the following elements is a metal that belongs to a main group or representative group?
A. magnesium, B. zinc, C. sulfur, D. uranium
1-6-5. All of the following are true, except...
A. Sodium is an alkali metal, B. Neon is a noble gas,
C. Calcium is an alkaline earth metal, D. Oxygen is a halogen
