Answer:
C = 2 and 1
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other
The nucleus of tritium contain two neutrons and one protons.
Tritium is the isotopes of hydrogen whit atomic mass 3 amu. The other two isotopes of hydrogen are protium and deuterium.
The atomic mass of deuterium is two amu having one proton and one neutron and atomic mass of protium is one having one proton and zero neutron.
All isotopes have same atomic number one.
Isotope:
The isotope of an element have same number of protons but different number of neutrons thus having same atomic number and different atomic mass.
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The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
Answer:
option a = Atoms are always in motion.
Explanation:
John Dalton gives atomic theory in 1808. The main postulates are following,
1 = All mater is composed of indivisible particle called atom.
2 =The atoms of same element are identical, but differ from another element.
3 = The atoms of different elements are combine in fixed proportion and form compound.
4 = Atom can not be created nor destroyed.
5 = Atom is smallest part of an element that take part in chemical reaction.
From above Dalton theory postulates it can be seen that all options are correct except option A.
Answer: CF4 is the formula
Explanation:
A. The energy added represents an energy change.
