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By the group number of the A columns

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Q: How does the periodic table indicate the numbers of valence electrons an element has?
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Related questions

How are the element within a row different?

They have different numbers of valence electrons.


What 2 numbers are shown in tye periodic table for each element?

The number above the symbol is the atomic number, or the number of protons in the nucleus of one atom of the element. It is this number by which they organized the periodic table. If this number changes so does the identity of the element. In a balanced atom this number will also be the number of electrons in the electron cloud. The number below is the atomic mass number, or the average number of particles (protons plus neutrons) in the nucleus. Since the number of neutrons can change this number must be given as an average so it may contain a decimal.


How do you find number of electrons in periodic table or how do you calculate the number of electrons?

A neutral atom has the same number of electrons as it does protons. The atomic numbers on the periodic table for each element are the number of protons. So, look up the element on the periodic table, note its atomic number, and you will then know the number of protons and electrons in a neutral atom of that element. For example, magnesium (Mg) has atomic number 12. So a neutral Mg atom would have 12 protons and 12 electrons.


What element has a 42 numbers for electrons?

Molybdenum is the element that has 42 electrons.


What is the law called that states the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements?

An element's atomic number is equal to the amount of electrons or protons in an atom of that element. When an atomic number increases or decreases, the amount of electrons is changing.


How do you find electrons in elements on the periodic table?

The number of electrons are equal to the number of protons which is equal to the atomic number. That's if you're trying to find the number of total electrons. If you want to find the number of valence electrons (electrons in the outermost shell) you must look at the group numbers. The group number is equivalent to the number of valence electrons.


How can you use the periodic table to find the amount of protons and electrons for an element?

The atomic number of an element is the number of protons in the nuclei of its atoms, and the elements are arranged according to their atomic numbers from 1 to 118. A neutral atom has the same number of electrons as protons.


What element on the periodic table has 6 electrons?

Carbon has 6 electrons. You can tell because its atomic number is 6, and atomic number is the number of protons. In a neutral atom, the numbers of protons and electrons are equal.


What shows the number of electrons in the outer energy level?

On the periodic table, for each element there is a column of 1 to 7 numbers on the right side, these numbers show the number of electrons in each shell, or layer, The bottom number is the number of electrons in the outermost layer


Why do elements within a periodic the periodic table have different properties?

They have different numbers of valance electrons...


How do you CALCULATE VALENCY?

If you look at the Periodic Table. inside one of the element's boxes, there will be numbers along the bottom or side. The last number tell you how many Valence electrons it has.


Is electrons the combining capaciuty of an element?

Maybe it can be electrons or mass numbers