Atoms/ Periodic Table

Which element has an atomic number 20

• Oxygen
• Hydrogen
• Potassium
• Calcium

Which part of the atom is on the outside of the nucleus and has a negative charge?

• Proton
• Electron
• Neutron
• Nucleus

In a chemical reaction a scientist reacted 4 grams of hydrogen and 7 grams of oxygen together. What should the mass of his product be?

• 4
• 7
• 0
• 11

Most of the elements on the periodic table are_____?

• Nonmetals
• Explosive
• Metalloids
• Metals

Which type of element is a poor conductor of heat and electricity

• Metals
• Nonmetals
• Metalloids

Ripping a piece of paper in half is a ___________

• Physical property
• Physical change
• Chemical Change
• Chemical Property

Which element has similar properties to Oxygen(O)

• Nitrogen(N)
• Chlorine(Cl)
• Sulfur(S)
• Lithium(Li)

What part of the atom has a positive charge?

• Proton
• Neutron
• Electron

The center of an atom is called______?

• Neutron
• Proton
• Nucleus
• Electron

What period can you find the element Carbon?

• 1
• 4
• 5
• 2