The sixth period of the periodic table is the longest period of the periodic table.
Which period is the longest period?
The sixth period is called the longest period because it has maximum 32 elements.
Which is the longest group in periodic table?
Group 1(H, Li, Na, K, Rb, Cs, Fr) is the longest group in the periodic table. The first group is called the alkali metals group.
Which is the longest period and longest group in long form of periodic table?
Answer: Group 3 is the longest group and sixth period is the longest period in periodic table with 32 elements.
What’s the shortest period in the periodic table?
The first period of the periodic table is the shortest period of the periodic table. The sixth period of the periodic table is the longest period of the periodic table.
Which period is known as incomplete period?
Note: 7th period is considered as an incomplete period even though it has 32 elements. Because it consists of elements whose properties have not been studied properly yet.
How many elements are in long period?
The very long period of 32 elements results from the completion of the 4f subshell of 14 electrons, the 5d subshell of 10 electrons, and the 6s, 6p octet.
Why is the 7th period incomplete?
7th period is considered incomplete because it consists of elements which have not been studied properly yet. … Thus, we can’t give them a permanent recognition as all the elements in the periodic table have many properties and similarities to follow.
Which of the following property increases as we go down the group in the periodic property *?
Explanation: Out of above options atomic radius increases down the group . It is the distance from center of nuclei to outermost shell of an atom.
How does atomic radius vary along a period and down a group in the periodic table?
Answer: In general, the atomic radius decreases as we move from left to right in a period with an increase in nuclear charge of the element. … The atomic radius increases when we go down a group because of the addition of extra shell.
How many periods are called long periods?
The fourth and fifth periods are long periods and contain 18 elements each. Sixth period is the longest and contains 32 elements in it. Seventh period is the incomplete period.
How many elements are in your first period?
There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements.
Who proposed law of triads?
In 1829, a German chemist, Johann Dobereiner (1780–1849), placed various groups of three elements into groups called triads. One such triad was lithium, sodium, and potassium. Triads were based on both physical as well as chemical properties.