So i found out that the apollo 11’s guidance computer had 2k memory but like of what? 2,000 terabytes? basically i would like to know the units

1 K = 1024 bytes; 1 TB ≈ 10^12 bytes

A byte is a unit of computer storage that can hold a single character (e.g. the letter "a" or the nymber "2").

The symbol K stands for kilobytes.  

A kilobyte (K or KB) is 2^10 bytes = 1024 bytes ≈ 1000 bytes.

Thus, the Apollo computer had 2048 bytes (about 2000 bytes) of memory.

A terabyte (TB) is 2^40 bytes = 1.099 511 627 776 × 10^12 bytes ≈ 10^12 bytes

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.  

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.