Mica is investigating the speed of waves. She hypothesizes that waves travel at different speeds
depending on the media. She sets up an
experiment where she sends two different waves through air, water, and
glass. She keeps the temperature of each medium constant and
measures the speed of the waves as they travel through each medium.
The data table shows her results.
My question is pair of diagrams is the most similar to what mica drew on the last picture

- 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

u i forgot the answer?