Pls help 3.Use the words below to complete the passage below. you can use the word more than once. antenna , loud speaker, microphone The sound energy of a person in a broadcasting station is converted into electrical energy by. Then the electrical energy is converted to electromagnetic waves by. The electromagnetic waves are transmitted through the air. The in the radio receives these electromagnet waves and convert them into electrical signal. The electrical signal is converted into sound energy by a​

the answer is learned

- 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 so just answer mine