Carbon is most commonly obtained from coal deposits, although it usually must be processed into a form suitable for commercial use. Three naturally occurring allotropes of carbon are known to exist: amorphous, graphite and diamond. ... Naturally occurring graphite occurs in two forms, alpha and beta.
Answer: A=7 for the isotope with 4 neutrons.
Explanation:A lithium atom contains 3 protons in its nucleus. Notice that because the lithium atom always has 3 protons, the atomic number for lithium is always Z = 3. The mass number, however, is A = 6 for the isotope with 3 neutrons, and A = 7 for the isotope with 4 neutrons.
Cells with haploid or N number of chromosomes are produced at the end of meiosis. in this division the number of chromosomes are halved. so daughter cells have half the number of chromosomes of the parent cell.
To solve you need to add the weight of each atom in one mol of the molecule. As there is 1 N and 3 H you need to add
14.01 + 3(1.008) = 17.034 g/mol