Often, the number of protons and electrons is not the same, so the atom carries a net positive or negative charge. You can determine the number of electrons in anionif you know its charge. A cation carries a positive charge and has more protons than electrons. An anion carries a negative...
Lithium properties are the same as other elements present in its Alkali metal family. The melting point of lithium is 180.5 C. On the other hand, and the boiling point is at 1342 C. when you put the lithium at room temperature, it is the least dense element with the valency of 1. Th...
● He more protons than H / He greater nuclear charge than H (1) ● in helium the outer electron is in the same shell as hydrogen (1)H > Li:● in lithium the outer electron is in a higher energy level / a new shell / further from the nucleus / in a 2s orbital (1) ● (and...
neutrons are found in the nucleus of the atom, while the electrons are outside the nucleus. The atomic number is the number of protons, while the mass number is the number of protons and neutrons. If an element is not charged, the number of electrons will equal the number of protons. ...
The number of protons in the nucleus of an atom is called theatomic number. It is represented by the symbolZ Example: Helium has an atomic number of 2 since it has two protons in its nucleus. Lithium has an atomic number of 3 since it has three protons in its nucleus. ...
Every caesium atom has 55 protons and hence the Z is 55. Atomic number of few elements Hydrogen= 1 Helium=2 Lithium=3 Beryllium=4 Boron=5 Carbon=6 Nitogen=7 Oxygen=8 Finding the Atomic Number From the given information, we can find out the atomic number of an element in the following...
Lithium is a chemical element that is abbreviated 'Li.' Its name comes from the word 'lithos,' which is a Greek word that means 'stone.' Answer and Explanation: The mass number of lithium is 7. The mass number of any element is equal to its number of protons and neutrons. You can ...
A mass number is a total count of all the protons and neutrons in the nucleus of an atom. Protons are the positively charged particles in the nucleus while the neutrons have a neutral charge. Each particle has a mass count of one.
Atomic number Z represents the number of protons per atom. Mass number Z + N is equal to the number of protons Z plus the number of neutrons N present in the nuclei. Mass numbers of the most abundant isotopes are given in order of decreasing abundance. For example, Cadmium Cd-48 mass ...
The mass number of an atom is the total number of protons and neutrons contained within the nucleus of the atom. The number of protons determines the element and will always equal the atomic number of that element. The number of neutrons can change and will determine which isotope of that...