Revision g7 w1

All of these are from the microorganisms except...................................

• algae

• lagomorph

• euglena

• amoeba

The atom is neutral because....................................................

• it has an equal number of protons and electrons
• it has an equal number of neutrons and electrons
• it has more electrons than protons
• it has more protons than electrons

Nucleus contains...................................and...............................................

• protons and electrons

• electrons and neutrons

• neutrons and protons

• energy levels and neutrons

The electronic configuration of Mg₁₂ is...................................and.............................element.

• K=2

  L=8

  M=4

  active

• K=3

  L=8

  M=1

  inactive

• K=2

  L=8

  M=2

  inactive

• K=2

  L=8

  M=2

  active

..................................plant has large leaves.

• Molukhyia

• Banana

• Clover

• Wheat

Sodium has a symbol of Na although it's not in its name. Give reasons

• The symbol Na comes from the Greek word for sodium, 'natrium'.
• The symbol Na comes from the chemical formula for sodium, 'NaCl'.
• The symbol Na is used because there's another element has symbol So

• The symbol Na comes from the Latin word for sodium, 'natrium'.

...................................has 2 pairs of incisors in upper jaw and 1 pair of incisors in lower jaw.

• Rabbit

• Rat

• Jerboa

• Squirrel

....................................have no body support.

Choose more than one answer

• Octopus

• Mussels

• Earth worm

• Reptiles

...................................cannot be distinguished into stems, roots and leaves.

• Black algae

• Wheat

• Palm tree

• Green algae

The symbol of silver is...................................

• Au

• Sl
• Ag

• Si