Chemistry Challenge

Number of valence electrons in halogens is ..........

• 1

• 4

• 3

• 7

These are found on the Periodic Table.

• Compounds
• Elements
• Mixtures

the positively charged subatomic particle contained in the nucleus of an atom

• proton

• neutron

• electron

• matter

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

• proton

• neutron

• electron

• matter

a negatively charged subatomic particle that orbits the nucleus of an atom

• proton

• neutron

• electron

• matter

Which color on the image of the periodic table corresponds with the noble gases.

• red

• black

• blue

• orange

What is krypton?

• element
• compound
• mixture

What are the two structures found in the atom's nucleus?

• Electrons and Neutrons
• Protons and Electrons
• Protons and Neutrons
• Neutrons and Electrons

What does the atomic number tell you?

• Number of Protons
• Number of Neutrons
• Sum of protons and neutrons

Use your periodic table to find which element has 5 protons.

• Lithium

• Calcium

• Boron

• Neon