1. Describe the movement of the particles in the air. 2. Choose two different particles found in the air. Explain how they are different and how they are the same.

3. Describe air using the terms: mixture, atoms, and molecules.

4. What is one source of CO2 ?

5. Describe the relationship between atoms and molecules.

6. Is the composition of air consistent? Explain your thinking.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

i don't know people like to fight everywhere rip.

it is stable as it is in group 0 which have full outer shells of electrons