Advertisements
Advertisements
Question
Match the atomic numbers 4,8,10,15 and 19 with each of the following:
An element which does not form ion
Advertisements
Solution
Atomic number 10
Electronic configuration (10): 2,8
APPEARS IN
RELATED QUESTIONS
Explain the Mass number with example.
What are the atomic numbers of elements whose outermost electrons is represented by 3s1.
What is variable valency? Name two elements having variable valency and state their valencies.
Tick the most appropriate answer.
Which of these have similar chemical properties but different set of physical properties and mass number?
- isobars
- elements
- isotopes
- none of these
WRITE SHORT ANSWER
Define the atomic mass number of an atom.
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number?
An atom of an element has two electrons in the M shell.
What is the (a) atomic number (b) number of protons in this element?
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Isotopes of hydrogen [11H, 21H, 31H]
Every atom has an equal number of protons and electrons. The nature of the atom is ______.
In which one of the following, the number of protons is greater than the number of neutrons but number of protons is less than the number of electrons?
