What is an atomic number simple definition?

atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.

What is the atomic number of uranium?

92
Uranium/Atomic number
Uranium is a silvery-white metallic chemical element in the periodic table, with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.

What is the 125th element?

Tellurium-125 atom is the stable isotope of tellurium with relative atomic mass 124.904425, 71.4 atom percent natural abundance and nuclear spin 1/2….4.3Related Element.

Element Name	Tellurium
Element Symbol	Te
Atomic Number	52

What is element 104 on the periodic table?

rutherfordium
IUPAC decided element 104 would be called rutherfordium.

What do you mean by atomic number Class 10?

The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. Atomic number = Number of protons. For example, in a sodium atom, there are 11 electrons and 11 protons.

What is atomic number and its example?

Atomic Number – The number of protons in the atom of an element is called the atomic number of the element. For example – The atomic number of sodium (11Na) is 11 as it has 11 protons in the nucleus of its atom. All atoms of a given element have the same number of protons.

Why is it called uranium 235?

Uranium was discovered in 1789 by Martin Klaproth, a German chemist, in the mineral called pitchblende. It was named after the planet Uranus, which had been discovered eight years earlier….47,731.