Question

Determina a que periodo y grupo pertenece un atomo cuyo numero atomico es 20

Answer 1

Explanation:

tanto su número atómico será Z = 20; es decir, se trata del calcio, cuyo símbolo es Ca. Pertenece al 4º período, pues los dos electrones

Answer 2

Answer:

The element with atomic number 20 is Calcium and in the periodic table, Calcium is present in the 2nd group and 4th period.

Explanation:

Groups and periods organize the elements in the Periodic Table of the Elements. Groups are the vertical columns below the periodic table, and the period is the horizontal row across the periodic table. Both the group and the period reflect the composition of the electrons in the atom. The atomic number of an element increases as it moves from top to bottom within the group or  from left to right over time.

• Elements in the same group have the same number of valence electrons. The number of valence electrons depends on the octet rule. For example, the elements in group 1 have one valence electron, the elements in the group 3-12 have variable valence electrons, and the elements in group 17 have seven valence electrons.
• Elements have the same number of electron shells and the same highest unexcited electron energy levels. Elements within a period show the tendency of the periodic table to move from left to right, such as atomic radius and ionic radius, electronegativity. There are seven element periods.

Correct Question:

The given question is found to be incomplete and the correct counterpart of it is given below:

"Determine the period and group to which the atom with atomic number  20 belongs."

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