Hydrogen (H), potassium (K), and sodium (Na) are all in the same A:Group
B:Period

So they have the same number of

A:Electron shell
B:Valence

Many state and local authorities are making laws regarding recreation on lakes, rivers, and oceans to reduce water pollution. why would lawmakers need to consult with scientists before making these laws? a) to make scientists feel important b) so that the laws reduce pollution by a sufficient amount c) so that parks and lakefront facilities will still make large profits d) so that the public will believe that the laws are important to follow

In which situations is the principle of cross-cutting relationship useful in determining relative age?

What is the role of the phospholipid belayer in cellular transport in living cells