Answer:
C.Tritium
Explanation:
Isotopes are forms of an element with different mass number but same atomic number. Mass number is the sum of the number of protons and neutrons in the nucleus of an atom, while atomic number is the number of protons.
Mass number = protons +neutrons.
Atomic number = protons only
We can say that mass number = atomic number + number of neutrons.
The number of neutrons is what differentiates the isotopes of an element.
For hydrogen element, it has three isotopes namely; protium, deuterium and tritium which have 0,1 and 2 neutrons respectively. Thus the answer is C
Answer:
Explanation:
Absolute dating uses for example, radiocarbon dating method to tell the numeric age of an organic substance and this is not always exact. In the other hand, relative age dating give a more precision since it is comparing the age of a particular part of the substance to the other parts. For example, comparing the lower layer of a rock to the upper layer, it is certain that the lower layer is older than the upper one.
Beryllium because it's a metal which is in nature usually found as cations held together by delocalized electrons and there is also a trend on the periodic table which suggests that ionization energy increases from left to right across a period and decreases from top to bottom down a group