Advertisements
Advertisements
Question
Choose the correct option and rewrite the statement.
The number of electrons in the outermost shell of alkali metals is _______.
Options
1
2
3
7
Advertisements
Solution
The number of electrons in the outermost shell of alkali metals is 1.
APPEARS IN
RELATED QUESTIONS
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
Why do we classify elements?
An element X is in group 2 of the periodic table What will be the formula of its chloride?
A metal X is in the first group of the periodic table. What will be the formula of its oxide?
The elements A, B and C belong to groups 1, 14, and 17 respectively of the periodic table.
(a) Which two elements will form a covalent compound?
(b) Which two elements will form an ionic compound?
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.
(a) How is possible valency of an element determined from the electronic configuration of its atom ?
(b) Determine the valency of an element X whose atomic number is 15.
What was the basis of the earliest attempts made for classification and grouping of elements?
State whether true or false. If false, correct the statement.
Metals can gain electrons.
If the distance between two Cl atoms in a Cl2 molecule is 1.98Å, then the radius of the Cl atom is ______.
What property forms the basis of identification?
An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.
The atom of an element has electronic configuration 2, 8, 7. To which of the following elements would it be chemically similar?
Which of the following is a transition element?
Which of the following property will be common in group 1 elements?
Element ‘A’ has electronic configuration 2, 7; ‘B’ has electronic configuration 2, 8, 5 and ‘C’ has electronic configuration 2, 8, 7. Which two elements will exhibit similar chemical properties?
Which type of elements are poor conductors of heat and electricity?
Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al
Relate the names of the following scientists with the statements given below.
Arranged elements into groups containing three elements each.
Relate the names of the following scientists with the statements given below.
Arranged elements in a group of seven with increasing atomic masses and eighth elements with similar properties kept below the first like eight note in an act of music.
