Atom and the Periodic Table

Which of the following elements is a metal?

• Boron

• Hydrogen

• Magnesium

• Chlorine

Which of the following elements is a halogen?

• Neon

• Barium

• Sulfur

• Bromine

What is the atomic number of aluminum?

• 13

• 26.982

• 27

• 14

Which element is the alkaline earth metal in period 5?

• Beryllium

• Strontium

• Potassium

• Sodium

Which of the following elements is a nonmetal?

• Iron

• Beryllium

• Silicon

• Nitrogen

How many protons does an atom of cobalt have?

• 27

• 58.933

• 59

• 32

An atom has 11 protons, 12 neutrons, and 10 electrons. Which element is it?

• Vanadium

• Sodium

• Neon

• Magnesium

Which of the following is a transition metal?

• Lithium

• Lead

• Tellurium

• Nickel

Mendeleev's periodic table was organized by _________, but the modern table is organized by _____________.

• Atomic number, Atomic mass

• Atomic mass, Atomic number

Which of the following elements is most likely to have similar properties to calcium?

• Potassium

• Scandium

• Magnesium

• Carbon