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Answers
Answer:
the first element is potassium
the no. of protons is 19
no. of neutrons is 20
no. of electrons is 19
the position of potassium in periodic table is at 19
the second element is phosphorus
the no. of protons is 15
no. of neutrons is 16
no. of electrons is 15
the position of phosphorous is 15 in the periodic table
Explanation:
we know the atom consists of same number of protons and electrons ,and the number of protons present in an atom is said to be its atomic number (z).the sum of the protons and neutrons is the mass number(A).so we can get the number of neutrons present in the atom of an element by subtracting the number of protons from the mass number.
Answer:
(1.) There are 19 protons and 20 neutrons present in potassium 'k' and it's electronic configuration is
1s², 2s², 2p6, 3s2, 3p6, 4s¹.It is a s-block element
(2.) There are 15 protons and 16 neutrons present in phosphorus 'p' and it's electronic configuration is
1s², 2s², 2p6, 3s²,3p³ .It is a P-block element