Y8 Ch4 AND Ph4 revision HW

What is the symbol for Helium?

• H

• He

• Hu

What is the symbol for sodium?

• Na

• Sa

• So

• S

True or False? Most of the elements are metals?

• True

• False

Which part of an atom has a positive charge?

• Proton

• Neutron

• Electron

Which part of an atom has a negative charge?

• Proton

• Neutron

• Electron

What is the atomic number of helium?

• 2

• 4

• 6

Which of the "Halogens" is found in liquid state at room temperature?

• Flourine

• Astatine

• Iodine

• Bromine

As you move down the group, halogens' reactivity...

• increases

• decreases

• doesn't change

• shows no trend.

Alkali metals are found in which group of the periodic table?

• Group 1
• Group 2
• Group 7
• group 8 

Which of the following is the most reactive in water?

• Lithium
• Sodium
• Potassium