1). Vacant place in periodic table.2). Identiya atomic mass. 3)identif

1.	1). Vacant place in periodic table.2). Identiya atomic mass. 3)identify group and period. 4).which name of element has question mark.
Answer» Answer: 1).there are some VACANT place in Mendeleev's periodic table. In some of these places the atomic masses are seen to be predicted. Enlist three of these predicted atomic masses along with their GROUP and period. 2. Due to uncertainty in the names of some of the elements, a question mark is indicated before the symbol in the Mendeleev's periodic table. 2) To calculate the atomic mass of a SINGLE atom of an element, add up the mass of protons and neutrons. 3) To find the position group & period of element in Periodic table and identify its properties. 1.The period of element relates the number of shells of an atom of the given element. 2.The group is similar to the no of valence electrons of given element.

1). Vacant place in periodic table.2). Identiya atomic mass. 3)identify group and period. 4).which name of element has question mark.

Answer»

Answer:

1).there are some VACANT place in Mendeleev's periodic table.

In some of these places the atomic masses are seen to be

predicted. Enlist three of these predicted atomic masses along

with their GROUP and period.

2. Due to uncertainty in the names of some of the elements, a

question mark is indicated before the symbol in the Mendeleev's

periodic table.

2) To calculate the atomic mass of a SINGLE atom of an element, add up the mass of protons and neutrons.

3) To find the position group & period of element in Periodic table and identify its properties.

1.The period of element relates the number of shells of an atom of the given element.

2.The group is similar to the no of valence electrons of given element.

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