When two atoms with different electronegativities are bonded together, a bond exists. these are displayed with an arrow originating at the atom with the electronegativity and pointing toward the atom with the electronegativity.?

Explanation:

Electronegativity is defined as the ability of an atom to readily accept one or more number of electrons.

When this electronegative atom comes in contact with a metal or less electronegative atom then more electronegative atom readily attracts an electron. (As nucleus contains protons which hold a positive charge can easily attract an electron).

For example, fluorine is a highly electronegative atom and it readily attracts an electron from hydrogen atom when both of them comes in contact with each other.

This reaction leads to the formation of hydrogen fluoride compound.  

So basically, electron is pulled by more electronegative atom from the less electronegative atom.

Thus, we can conclude that when two atoms with different electronegativities are bonded together, a bond exists. These are displayed with an arrow originating at the atom with the less  electronegativity and pointing toward the atom with more electronegativity.

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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