# of electrons

[asalest 2K]

Hi,
how do we count the number of electrons each element has?

[Chloe Little 3K]

The number of electrons an element has is equal to its atomic number.

[Nathan Lao 2I]

The amount of electrons is the same as the atomic number. If you want to find valence electrons, it would be the number in the ones place for elements in group 1,2, and 13-17. For example, oxygen is in group 16 and it has 6 valence electrons.

[Shruti Kulkarni 2I]

Hi! I agree with the above statements. If you want to find the number of total electrons of the element, you look at the atomic number. And if you want to find the number of valence electrons, you would look at the number of electrons in the s and p orbitals for rows 1-3.

[Hailey Kang 2K]

Hi!

The total number of electrons is equal to the atomic number.

[Inderpal Singh 2L]

Equivalent to it's atomic number.

[Sejal Parsi 3K]

Hi! The number of electrons would be the same as the atomic number and if you are referring to the valence electrons, it would be the amount of electrons in the incomplete shell of the element.

[Aaina 2D]

Like the statements above, the number of electrons for an element is equivalent to its atomic number. To find the number of valence electrons, however, you would need to count the number of electrons in an elements' outermost shell. For example, in Magnesium, the number of electrons is = to its atomic number - 12. The number of valence electrons is 2, because that's how many there are in its outermost shell.

[Jordi M 2I]

The number of total electrons for a ground state element should be equal to its atomic number. The number of valence electrons can be found by counting the element's position in a period. For example, oxygen is the sixth element in the second period so it has 6 valence electrons (2 in the 2s state and 4 in the 2p state).

[Ximeng Guo 2K]

number of e- = number of protons in an atom (atomic number)

[Nathan Chu 3H]

The number of an electrons in an atom is equal to its atomic number. For example, Oxygen has an atomic number of 8, so it has 8 electrons. However, a cation will have less electrons (positive charge) and an anion will have more electrons (negative charge).

[Gigi Elizarraras 2C]

To find the number of electrons in an atom just look at its atomic number:) because the number of protons in an atom matches the number of electrons. To find the number of valence electrons in an atom just count across the period on the period table!

[Lung Sheng Liang 3J]

Hello, atoms have the same number of electrons as the atomic number unless otherwise mentioned.

[Carly_Lipschitz_3H]

You count the number of electrons an element has by its atomic number. The number of electrons an element has changes when it is a cation or an anion. To find the electron numbers of those you just add or subtract from the atomic number based on if electrons were added or removed.

[Daniela_Martinez_3B]

The number of electrons is equal to the number of protons of each element! An atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions, however, are atoms with extra electrons or missing electrons.

[Shana Patel 1C]

how do we count the number of electrons each element has?
The number of electrons is equal to the atomic number. This is the number of protons in an atom.

[Moura Girgis 1F]

We can count the number of elements within an atom based on its atomic number, which is also the number of protons in that element. In an ion, it would be the atomic number plus the charge (negative or positive).

[David Y]

number of valence electrons is based on the columns starting with left side column 1 of Hydrogen and they hace 1 valence eletron and so on for the other columns. column #= valence electron #

[josephspindler2H]

Each element has a number of electrons equal to its atomic number. However, it can have more or less depending on if it is an ion or not (loses as a cation (+), gains as an anion (-)).

[Mingzi Yang 1E]

The number of electrons of an element is the same as the atomic number. If it asks for the valence electron, then the column number of where the element is in, is the number of the valence electron.

[Christine Nguyen 3D]

The number of electrons should be the same number as the element's atomic number.

[Hasan Mirza 3F]

Assuming the atom is neutral, the # of electrons will = the number of protons (given by the atomic number).

[Sean Phen]

Hi, the number of elections is equal to the number of protons (in other words: the atomic number).

[Jolie Sukonik 2B]

Hi! Because elements on the periodic table are assumed to be electrically neutral rather than ionized/charged, the number of electrons is equal to the number of protons in an atom, aka the atom's atomic number.