What is the main component of the earths ancient atmosphere?

How do you get all the amino acids that your body needs to make proteins?

The half-life of a particular element is 280 days. what is its decay constant?

In the formula for barium chloride barium is written first because it is

Which is a type of tectonic plate boundary?

David is doing an investigation about factors that affect plant growth, so he plants two young elm trees near each other in his garden.

Particles inside an atom they have a positive charge

Which gas occupies the highest volume at STP?0.02 mol of O20.1 mol of Cl21 mol of N22 mol of H2

Which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell to accommodate more than eight electrons? o he n br?

Four forces are being applied to move an object to the left. Force 1 is pushing to the right at 200 N. Force 2 is pushing to the left at 500 N. Force 3 is pushing to the right at 100 N. Force 4 is pushing to the left at 50 N.

When two forces acting on an object are equal, they are