Question

Consider the section of the periodic table:
Identify A, B, C and D.
A. (a)
B. (b)
C. (c)
D. (d)

Answer 1

The elements are recognized as:

A. Na = Sodium

B. Ca = Calcium

C. B = Boron

D. Ge = Germanium

Periodic table:

• All identified chemical elements are arranged in rows (referred to as periods) and columns (referred to as groups) in the periodic table of chemical elements, also known as the periodic table, in ascending order of atomic number.
• The structure for the contemporary periodic table was developed in 1869 by Russian chemist Dmitri Mendeleev, who left spaces for elements that had not yet been discovered.
• When placing the elements in groups according on their atomic weight, he would rearrange them if he discovered that they did not fit.

Sodium:

• The chemical element sodium has the atomic number 11 and the symbol Na.
• It is a delicate, silvery-white metal that is exceedingly reactive.
• Due to its placement in group 1 of the periodic table, sodium is an alkali metal.
• The free metal must be synthesized from compounds because it does not exist in nature.

Calcium:

• Calcium is a mineral that is most frequently linked to strong bones and teeth, but it also plays a critical role in blood clotting, assisting with muscular contraction, and regulating regular heartbeats and nerve activity.

Boron:

• The chemical element boron has the atomic number 5 and the letter B in its symbol.
• It is an amorphous brown powder and a brittle, black, glossy metalloid in its crystalline form.

Germanium:

• A silvery-gray metalloid with properties halfway between those of metals and nonmetals, germanium (Ge), a chemical element in Group 14 (IVa) of the periodic table, is situated between silicon and tin.

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