Advertisements
Advertisements
Question
Write the number of horizontal rows in the modern periodic table. What are these rows called?
Solution
There are seven horizontal rows in the modern periodic table; these rows are called periods.
RELATED QUESTIONS
Name the element that has two shells, both of which are completely filled with electrons.
Calculate the number of gram atoms in 4.6 grams of sodium (Na = 23)
Rewrite the following statement after correction, if necessary:
Elements in the same period have equal valency
How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?
State the trends in physical properties on moving down the group. Give an example to illustrate.
How do the following change on moving from left to right in a period of the periodic table?
Give examples in support of your answer.
Chemical reactivity of elements ?
An element X belong to 3rd periods and group II of the periodic table state:
the valency,
State the number of elements in periods 1, Periods 2, and Period 3 of the periodic table. Name them.
First ionization enthalpy of two elements X and Y are 500 KJ mol-1 and 375 KJ mol-1 respectively. Comment about their relative position in a group as well as in a period.
State whether the following statement is true or false
Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32.
