Advertisements
Advertisements
प्रश्न
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Advertisements
उत्तर
(a) Atomic no. of the element = 18.
(b) Element Z is a non-metal
(c) Element Z will not form any ion because its outermost shell is complete.
(d) Outermost electronic shell of the atom of this element is completely filled with electrons.
(e) Name of element Z is Argon Symbol is Ar.
(f) Z belongs to the noble gases group or the zero group of the periodic table.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
Write the names of the elements present in the:-
Ammonia
Write the names of `"Na"_3"PO"_4` compounds :
Give the charge and the mass of an electron, proton and neutron present in an atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
Fill in the blank
An _______ is electrically neutral.
How is the size of an atom indicated ?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Draw the electron dot structure of this compound.
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Draw the diagrams representing the atomic structures of the following: Neon
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Define the following term with an example.
Element
______ is the smallest particle of an element.
Atoms of one element can be transmuted into atoms of other elements by ______
______ is a substance that is made up of three oxygen atoms chemically combined.
Lead is also known as plumbum.
The ______ are combination of atoms of various elements or the same element.
