Advertisements
Advertisements
प्रश्न
A compound containing one atom of carbon and two atoms of oxygen is ______.
Advertisements
उत्तर
A compound containing one atom of carbon and two atoms of oxygen is CO2
APPEARS IN
संबंधित प्रश्न
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Write the names of the elements present in the :-
Sulphuric acid
Write the names of the elements present in the:-
Acetic acid
Write the names of `("NH"_4)_2"SO"_4` compounds:
Write the names of `"Na"_3"PO"_4` compounds :
Fill in the blank
An ion with positive charge is called ______
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 ?
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
What value has been given to the mass of this reference atom ?
Is it possible to see atoms these days ? Explain your answer.
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Which of the following statement is correct about the atom of an element ?
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Draw the diagrams representing the atomic structures of the following: Neon
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
An element is composed of ______ atoms.
Give the salient features of “Modern atomic theory”.
Which of the following has maximum number of atoms?
The smallest unit of an element is ______.
Lead is also known as plumbum.
The first scientific theory about atoms was given by J J. Thomson.
