6. What is the wavelength of an electromagnetic wave that travels at 3 × 108 m/s and has a frequency of 60 MHz? (1 MHz = 1,000,000 Hz) 60 MHz × 300,000,000 m/s No answer can be determined from the information given.

fun caring loving person

c. 75.7

i think that is the right

he would use the colour black

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.