Consider the following three statements: (i) for any electro-magnetic radiation, the product of the wavelength and the frequency is a constant. (ii) if a source of light has a wavelength of 3.0 å, its frequency is 1.0*1018 hz. (iii) the speed of ultra-violet light is greater than the speed of microwave radiation. which of these three statements is or are true? (a) only one statement is true. (b) statements (i) and (ii) are true. (c) statements (i) and (iii) are true. (d) statements (ii) and (iii) are true. (e) all three statements are true.

(b) Statements (i) and (ii) are true.  

Explanation:

(i) Wavelength and frequency

fλ = c

TRUE

(ii) Frequency

3.0 Å  = 3.0 × 10⁻¹⁰ m

fλ = c

TRUE

(iii) Speed of radiation

FALSE. The speed of electromagnetic waves is a given medium is a constant.

Statements (i) and (ii) are TRUE.

20 drops hope this

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72