Given the following information, identify which of these are the same element. be sure to explain your answer.
element 1: 6 protons, 6 neutrons, 6 electrons
element 2: 7 protons, 6 neutrons, 7 electrons
element 3: 6 protons, 7 neutrons, 7 electrons

The same elements are :

Element 1 and Element 3

Both contain equal number of proton = 6

Explanation:

In the modern periodic table elements are arranged according to their atomic number. Hence those elements which have same atomic number are same element.

Atomic Number = The number of protons present in the nucleus of the atom is called atomic number.

The same element can have different number of neutrons , this occur in the case of isotopes.

The same element can have different number of electrons . When the element form ions (cation and anions) the number of protons and electrons are different.

The same element can never have different Proton.

So,

In case of Element 1 and Element 3 : The number of proton are same = 6 . Hence they are same element (= Carbon "C")

Element 1 = Neutral (= zero charge) because it has equal numbe rof proton and electron.

Element 3 =Anion(= negative charge) because it has more electron(= 7) , Than proton(=6)

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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