Calcium belongs to group 2 of the periodic table, therefore the most likely when linked is that:
a) gain 2 electrons
2) share 2 electrons
3) lose 2 electrons
4) gain 6 electrons

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

give me abc and i will get it for u.

you gotta add the following molecules so we can give u an answer

explanation: