Periodic Table

  What are the different types of elements?t

• Alkali Metal
• Alkaline earth
• Transition metal
• Post transition metal
• Metaloid
• Non-Metal
• Noble gas
• Actinide
• Lanthanide 

 

  What are transition metals?

• They have valence electrons in two shells instead of one. In the periodic table, they are found in the middle.

  What are Alkali metals?

• They are reactive and have a positive electrical charge. They are found on the left side of the periodic table.

  What are noble gases?

• They are odourless and has a low chemical reactivity. They are found on the right side of the periodic table.

94 of the elements in the periodic table happen in nature while the rest are man-made.

Bones

                                            What are the bones? The bones form the skeleton of the body. We have 206 bones in our bodies while babies have 300 bones.

 How does our body make them? The bones start off as cartilage. They are made from the same minerals as a tiger’s sharp claw. It is composed mainly of calcium phosphate and calcium carbonate. Muscles pull against the bones to make the body move.

How do they grow and repair? They grow with the help of calcium. The bones of a child’s bones fuse together to make the bones 206 adult bones.  How the bones heal themselves is that the body forms a blood clot around the fracture to protect it. Bone cells start to grow into both sides of the fracture. Then in closes it up.