Which of these equalities is correct? question 15 options: 1 cm = 100 m 1 g = 1000 kg 1 l = 1000 ml 1 mm = 10 cm

If you do the shopping for your family -- even sometimes -- it helps to look at labels. Fruit juices are usually marketed in 1 L cardboard containers. A can of coke comes in 355 mL sizes. The mL is a smaller measurement than a Liter.

Therefore  by comparring your coke can to the 1 Liter juice, you can imagine that 1000 mL = 1 Liter.

The rest are all backwards

100 cm = 1 meter. Take a look at a ruler if you have one. The cm is smaller that 1 meter. A 12 inch ruler is about 30 cm which is about 1/3 of a meter.

10 mm = 1 cm. Again look at your ruler. There are 10 lines between 1 cm and the next one.

1000 grams = 1 kilo. The word kilogram means 1000 somethings. So 1000 grams = 1 kg.

- 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