1. Atomic Number Of Copper
2. What Is The Atomic Number Of C-13

Symbol: C Atomic Number: 6 Atomic Mass: 12.0107 amu Melting Point: 3500.0 °C (3773.15 K, 6332.0 °F) Boiling Point: 4827.0 °C (5100.15 K, 8720.6 °F) Number of Protons/Electrons: 6 Number of Neutrons: 6 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 2.62 g/cm 3 Color: May be black Atomic Structure.

1. Element 6 of Periodic table is Carbon with atomic number 6, atomic weight 12.0107. Carbon, symbol C, has a Simple Hexagonal structure and Black color. Carbon is a other nonmetal element. Trivial name of Carbon is tetrels, crystallogens.
2. Chemical elements alphabetically listed The elements of the periodic table sorted by name in an alphabetical list. Click on any element's name for further chemical properties, environmental data or health effects.
3. Total number of subatomic particles in its nucleus B. Weighted average of the masses of the isotopes of the element C. Total mass of the isotopes of the element. Average of the mass number and the atomic number for the element.

(1) and (2)

(2) and (3)

(1) and (3)

(1), (2) and (3)

Solution:

Given,
Atomic number of element B = Z
(v noble gas .-. belong to zero group) Atomic number of element A = Z - 1
(ie, halogens)
Atomic number of element C = Z + 1
(ie, group IA)
Atomic number of element D = Z + 2
(ie, group IIA)
$because $ Element B is a noble gas
$therefore $ Element A must be a halogen ie, have highest electron affinity.and element C must be an alkali metal and exist in +1 oxidationstate. and element D must be an alkaline earth metal with +2 oxidation state.

1. An electronic transition in hydrogen atom results - in the formation of Ha line of hydrogen in Lyman series, the energies associated with the electron in each of the orbits involved in the transition (in $kcal , mol^{-1}$) are

2. The velocities of two particles A and B are 0.05 and 0.02 ms respectively. The mass of B is five times the mass of A. The ratio of their de- Broglie's wavelength is

3. If the mass defect of $_5B^{11}$ is 0.081 u, its average binding energy (in MeV) is

4. The atomic numbers of elements $ A, B, C $ and $D$ are $Z - 1, Z, Z + 1$ and $Z + 2,$ respectively. If $'B'$ is a noble gas, choose the correct answers from the following statements
(1) 'A' has higher electron affinity
(2) ’C' exists in +2 oxidation state
(3) 'D' is an alkaline earth metal

5. The bond length of HCI molecule is 1.275 A and its dipole moment is 1.03 D. The ionic character of the molecule (in percent) (charge of the electron $= 4.8 times 10^{~10}$ esu) is

6. Which one of the following is a correct set?

7. Match the following:

List-I		List-n (At STP)
(A)	$ce{ 10 , g , CaCO_3 ->[Delta][decomposition] }$	(i)	$ce{ 0.224 , L , CO_2}$
(B)	$ce{ 1.06 , g , Na_2 CO_3 ->[Excess , HCl]}$	(ii)	$ce{ 4.48 , L , CO_2}$
(C)	$ce{2.4 , g , C ->[Excess , O_2][combustion]}$	(iii)	$ce{0.448 , L , CO_2 }$
(D)	$ce{0.56 , g , CO ->[Excess , O_2][combustion]}$	(iv)	$ce{ 2.24 , L , CO_2}$
(v)	$ce{ 22.4 , L , CO_2}$

The correct match is

8. What is the temperature at which the kinetic energy of 0.3 moles of helium is equal to the kinetic energy of 0.4 moles of argon -at 400 K?

9. When 25 g of a non-volatile solute is dissolved in 100.g of water, the vapour pressure is lowered by $2.25 times 10^{-1}, mm$. If the vapour pressure of water at $20^{circ} C$ is 17.5 mm, what is the molecular weight of the solute?

10. Assertion (A): The aqueous solution of $ce{CH3COONa }$ is alkaline in nature.
Reason (R): Acetate ion undergoes anionic hydrolysis
The correct answer is

1. In Wolff‐Kishner reduction, the carbonyl group of aldehydes and ketones is converted into

2. Identify compound X in the following sequence of reactions:

3. Identify a molecule which does not exist.

4. Identify the incorrect match.

Name		IUPAC Official Name
A	Unnilunium	i	Mendelevium
B	Unniltrium	ii	Lawrencium
C	Unnilhexium	iii	Seaborgium
D	Unununnium	iv	Darmstadtium

5. Reaction between acetone and methyl magnesium chloride followed by hydrolysis will give :

6. Identify the correct statements from the following:
(a) $CO_2(g)$ is used as refrigerant for ice-cream and frozen food.
(b) The structure of $C_{60}$ contains twelve six carbon rings and twenty five carbon rings.
(c) $ZSM-5$, a type of zeolite, is used to convert alcohols into gasoline.
(d) $CO$ is colorless and odourless gas.

7. Which of the following set of molecules will have zero dipole moment ?

8. On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:

9. An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radiusis:

10. Find out the solubility of $Ni(OH)_2$ in 0.1 M NaOH. Given that the ionic product of $Ni(OH)_2$ is $2 times 10^{-15}$

The elements of the periodic table sorted by name in an alphabetical list.

Click on any element's name for further chemical properties, environmental data or health effects.

This list contains the 118 elements of chemistry.

Click here: for a schematic overview of the periodic table of elements in chart form

Do you need to know the weight of some molecules? Try our Molecular Weight Calculator!

Please report any accidental mistake in the above statistics on chemical elements.

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Atomic Number Of Copper

What Is The Atomic Number Of C-13

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