What is the element with 20 electrons?

1 Answer. If Z , the atomic number = 20 , there MUST be 20 nuclear protons, and the element MUST be calcium, with 20 electrons associated with it.

How many electrons are in an atom with an atomic number of 20?

Calcium has an atomic number of 20 which means it would have 20 protons and 20 electrons in a neutral state as an atom.

How many electrons would a neutral element have if its atomic number is 20?

An ion is a neutral atom which has gained or lost an electron. An ion with a positive charge is called a cation. So Ca (Calcium) looses two electrons, what will be the resulting charge? Ca has 20 protons, so neutral it would have 20 electrons, but according to the charge, 2 electrons have been lost.

How many electrons does 20 protons have?

The completed passage is: Ca2+ represents an ion with 20 protons and 18 electrons. A calcium atom has 20 protons and 20 electrons. The 2+ charge next to the symbol indicates a loss of two electrons: 20-2=18.

What is the overall charge of an atom?

Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

How many protons are in the atomic number 20?

The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.

What atom of an element contains 20 protons 20 neutrons and 20 electrons?

A quick look in the periodic table will reveal that calcium has an atomic number equal to 20 . Now, in order for an atom to be an atom of calcium, it Must contain 20 protons in its nucleus. Always. The number of neutrons can vary, but the number of protons must always be equal to 20 for a calcium isotope.

What is the number of electrons in an atom that has 20 protons and 17 neutrons?

37
What is the number of electrons in an atom that has 20 protons and 17 neutrons? 1. 37 (2. 20 p= e in an atom.

What isotope has an atomic number of 20?

The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.