An element is represented as A 20 40 . What is its atomic number?

The element is represented as A 20 40 . The atomic number of the given element is 20 . The atomic number is equal to the number of electrons and protons in a neutral atom.

An element is represented as A 20 40 . What is its mass number?

An element is represented by A 20 40 . The mass number of the element is 40 . Mass number is calculated by; Mass number = atomic number + neutrons

An element is represented as A 20 40 . What is the number of protons in its nucleus?

The element is represented by A 20 40 . The number of proton in the nucleus of this element is 20 because the atomic number of the element is 20 and the atomic number is equal to the number of electrons and protons in a neutral atom. Hence, the number of protons in its nucleus is 20 .

An element is represented as A 20 40 . What is the number of electrons in its atom?

The element is represented by A 20 40 . The number of electrons of the element is 20 because the atomic number of this element is 20 and the atomic number gives the number of electrons and protons in a neutral atom.

An element is represented as A 20 40 . What is the number of neutrons in its nucleus?

The element is represented by A 20 40 . In an atom, the Neutron number plus atomic number equals atomic mass number: N + Z = A . Therefore, N + 20 = 40 N = 40 - 20 N = 20 The number of neutron of the element A is 20 .

An element is represented as A 20 40 . What is its valency?

The valency of an element A is 2 because the atomic number of element A is 20 due to which its electronic configuration will be 2 , 8 , 2 . As we can see that there are two electrons in the outermost shell of A which gives the valency as 2 .