Advertisements
Advertisements
Question
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
Solution
Name: Hydrogen
Symbol: H
Explanation:
Hydrogen (H) has the smallest atomic mass of 1.008 u. It is the lightest and most abundant element in the universe, playing a crucial role in chemical reactions, including combustion and acid-base reactions.
RELATED QUESTIONS
Arrange the following as per the instruction given in the brackets:
Na, K, Li (Increasing atomic size)
Give the trends in atomic size on moving down the group.
Why is the size of sodium is greater than magnesium?
Which is greater in size an atom or a cation?
The following questions refer to the Periodic Table.
What happens to the atomic size of elements moving from top to bottom of a group?
Nanometer unit is used to measure atomic radius.
The size of an atom depends on the number of valence electrons.
The electronic configuration of metal A is 2, 8, 18, 1.
The metal A when exposed to air and moisture forms B a green layered compound. A with con. H2 SO4 forms C and D along with water. D is a gaseous compound. Find A, B, C, and D.
Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If the atomic number of carbon is 6, the atomic number of silicon is ______
An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?
Which of the following is the correct order of size?
Which among the following elements has the largest atomic radii?
Which of the following are the characteristics of isotopes of an element?
- Isotopes of an element have same atomic masses
- Isotopes of an element have same atomic number
- Isotopes of an element show same physical properties
- Isotopes of an element show same chemical properties
Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.
- Where in the periodic table are elements X and Y placed?
- Classify X and Y as metal (s), non-metal (s) or metalloid (s)
- What will be the nature of oxide of element Y? Identify the nature of bonding in the compound formed
- Draw the electron dot structure of the divalent halide
Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element A would have ______ atomic size than B.
