What does amphoteric mean?

What type of solution is formed when a metal oxide is dissolved in water?

What type of solution is formed when a non-metal oxide is dissolved in water?

When magnesium burns with oxygen:
i-what is the colour of the flame
ii-what does the product look like
iii-is it alkaline or base when dissolved in water

When carbon is burnt in air
i-what is the colour of the flame
ii-what does the product look like
iii-is it alkaline or base when dissolved in water

When sulfur is burnt in air
i-what is the colour of the flame
ii-what does the product look like
iii-is it alkaline or base when dissolved in water

When sodium is burnt in air
i-what is the colour of the flame
ii-what does the product look like
iii-is it alkaline or base when dissolved in water

When iron is burnt in air
i-what is the colour of the flame
ii-what does the product look like
iii-is it alkaline or base when dissolved in water