Chemistry-
General
Easy

Question

The line spectrum of two elements is not identical because

  1. They do not have same number of neutrons    
  2. They have dissimilar mass number    
  3. They have different energy level schemes    
  4. They have different number of valence electrons    

The correct answer is: They have different energy level schemes

Related Questions to study

General
Chemistry-

How many electrons in an atom with atomic number 105 can have open parentheses n plus l close parentheses equals 8 ?

How many electrons in an atom with atomic number 105 can have open parentheses n plus l close parentheses equals 8 ?

Chemistry-General
General
Maths-

A r e a blank o f blank t h e blank r e g i o n blank b o u n d e d blank b y blank y equals open vertical bar x close vertical bar blank a n d blank y equals 2 blank i s

A r e a blank o f blank t h e blank r e g i o n blank b o u n d e d blank b y blank y equals open vertical bar x close vertical bar blank a n d blank y equals 2 blank i s

Maths-General
General
Maths-

T h e blank a r e a blank b o u n d e d blank b y blank y to the power of 2 end exponent equals 4 a x blank a n d blank y equals m x blank i s fraction numerator a to the power of 2 end exponent over denominator 3 end fraction s q. blank u n i t s blank t h e n blank m equals blank

T h e blank a r e a blank b o u n d e d blank b y blank y to the power of 2 end exponent equals 4 a x blank a n d blank y equals m x blank i s fraction numerator a to the power of 2 end exponent over denominator 3 end fraction s q. blank u n i t s blank t h e n blank m equals blank

Maths-General
parallel
General
Maths-

I f blank z to the power of 2 end exponent plus z plus 1 equals 0 comma where z is a complex number, then the value of open parentheses z plus fraction numerator 1 over denominator z end fraction close parentheses to the power of 2 end exponent plus open parentheses z to the power of 2 end exponent plus fraction numerator 1 over denominator z to the power of 2 end exponent end fraction close parentheses to the power of 2 end exponent plus open parentheses z to the power of 1 end exponent plus fraction numerator 1 over denominator z to the power of 3 end exponent end fraction close parentheses to the power of 2 end exponent plus midline horizontal ellipsis plus open parentheses z to the power of 6 end exponent plus fraction numerator 1 over denominator z to the power of 6 end exponent end fraction close parentheses to the power of 2 end exponent text  is end text

I f blank z to the power of 2 end exponent plus z plus 1 equals 0 comma where z is a complex number, then the value of open parentheses z plus fraction numerator 1 over denominator z end fraction close parentheses to the power of 2 end exponent plus open parentheses z to the power of 2 end exponent plus fraction numerator 1 over denominator z to the power of 2 end exponent end fraction close parentheses to the power of 2 end exponent plus open parentheses z to the power of 1 end exponent plus fraction numerator 1 over denominator z to the power of 3 end exponent end fraction close parentheses to the power of 2 end exponent plus midline horizontal ellipsis plus open parentheses z to the power of 6 end exponent plus fraction numerator 1 over denominator z to the power of 6 end exponent end fraction close parentheses to the power of 2 end exponent text  is end text

Maths-General
General
Maths-

T h e blank a r e a blank o f blank t h e blank g r e a t e r blank r e g i o n blank b o u n d e d blank b y blank y equals C o s blank x semicolon blank y equals x plus 1 blank a n d blank y equals 0 blank i s

T h e blank a r e a blank o f blank t h e blank g r e a t e r blank r e g i o n blank b o u n d e d blank b y blank y equals C o s blank x semicolon blank y equals x plus 1 blank a n d blank y equals 0 blank i s

Maths-General
General
Maths-

T h e blank a r e a blank o f blank t h e blank r e g i o n blank b o u n d e d blank b y blank square root of x plus square root of y equals 1 blank i n blank t h e blank f i r s t blank q u a d r a n t blank i s

T h e blank a r e a blank o f blank t h e blank r e g i o n blank b o u n d e d blank b y blank square root of x plus square root of y equals 1 blank i n blank t h e blank f i r s t blank q u a d r a n t blank i s

Maths-General
parallel
General
Maths-

The area of the region bounded by the curve y=f(x), x-axis and the ordinates x=a, x=b (a>b) is

For such questions, we should be careful about the limits on variable.

The area of the region bounded by the curve y=f(x), x-axis and the ordinates x=a, x=b (a>b) is

Maths-General

For such questions, we should be careful about the limits on variable.

General
Maths-

T h e blank l i n e blank x equals fraction numerator pi over denominator 4 end fraction blank d i v i d e s blank t h e blank a r e a blank o f blank t h e blank r e g i o n blank b o u n d e d blank b y blank y equals s i n blank x comma blank y equals c o s blank x blank a n d blank x minus a x i s open parentheses 0 less or equal than x less or equal than fraction numerator pi over denominator 2 end fraction close parentheses text into two regions of areas  end text A subscript 1 end subscript blank a n d blank A subscript 2 end subscript blank t h e n blank A subscript 1 end subscript colon A subscript 2 end subscript equals

T h e blank l i n e blank x equals fraction numerator pi over denominator 4 end fraction blank d i v i d e s blank t h e blank a r e a blank o f blank t h e blank r e g i o n blank b o u n d e d blank b y blank y equals s i n blank x comma blank y equals c o s blank x blank a n d blank x minus a x i s open parentheses 0 less or equal than x less or equal than fraction numerator pi over denominator 2 end fraction close parentheses text into two regions of areas  end text A subscript 1 end subscript blank a n d blank A subscript 2 end subscript blank t h e n blank A subscript 1 end subscript colon A subscript 2 end subscript equals

Maths-General
General
Maths-

T h e blank a r e a blank e n c l o s e d blank b e t w e e n blank t h e blank c u r v e s blank y to the power of 2 end exponent equals x blank a n d blank y equals open vertical bar x close vertical bar blank i s

T h e blank a r e a blank e n c l o s e d blank b e t w e e n blank t h e blank c u r v e s blank y to the power of 2 end exponent equals x blank a n d blank y equals open vertical bar x close vertical bar blank i s

Maths-General
parallel
General
Maths-

The number of solutions of the equation
sin 2x = [1 + sin 2x] + [1 cos 2x] in open square brackets 0 comma fraction numerator pi over denominator 2 end fraction close square bracketswhere [.] is the greatest
integer function is

The number of solutions of the equation
sin 2x = [1 + sin 2x] + [1 cos 2x] in open square brackets 0 comma fraction numerator pi over denominator 2 end fraction close square bracketswhere [.] is the greatest
integer function is

Maths-General
General
Maths-

If c o s invisible function application x c o s invisible function application 2 x c o s invisible function application 4 x c o s invisible function application 8 x equals fraction numerator cosec invisible function application x over denominator 16 end fraction, then

If c o s invisible function application x c o s invisible function application 2 x c o s invisible function application 4 x c o s invisible function application 8 x equals fraction numerator cosec invisible function application x over denominator 16 end fraction, then

Maths-General
General
Maths-

T h e blank a r e a blank o f blank t h e blank r e g i o n blank open parentheses i n blank s q. blank u n i t s close parentheses comma blank i n blank t h e blank f i r s t blank q u a d r a n t comma blank b o u n d e d blank b y blank t h e blank p a r a b o l a blank y equals 9 x to the power of 2 end exponent blank a n d blank t h e blank l i n e s blank x equals 0 comma y equals 1 blank a n d blank y equals 4 blank i s colon

T h e blank a r e a blank o f blank t h e blank r e g i o n blank open parentheses i n blank s q. blank u n i t s close parentheses comma blank i n blank t h e blank f i r s t blank q u a d r a n t comma blank b o u n d e d blank b y blank t h e blank p a r a b o l a blank y equals 9 x to the power of 2 end exponent blank a n d blank t h e blank l i n e s blank x equals 0 comma y equals 1 blank a n d blank y equals 4 blank i s colon

Maths-General
parallel
General
Maths-

Number of solutions of the equation Sin x + sin2x + sin3 x + sin4x + ……. Π= 2 where x Π[0,4Π], is

Number of solutions of the equation Sin x + sin2x + sin3 x + sin4x + ……. Π= 2 where x Π[0,4Π], is

Maths-General
General
Maths-

The number of real solutions of the equation s i n invisible function application open parentheses fraction numerator pi x over denominator 2 square root of 3 end fraction close parentheses equals x to the power of 2 end exponent minus 2 square root of 3 x plus 4is

The number of real solutions of the equation s i n invisible function application open parentheses fraction numerator pi x over denominator 2 square root of 3 end fraction close parentheses equals x to the power of 2 end exponent minus 2 square root of 3 x plus 4is

Maths-General
General
Maths-

For which of the following values of m is the area of the region bounded by the curve y =x -blank x to the power of 2 end exponent blankand the line y = mx equal to 9/2…

For which of the following values of m is the area of the region bounded by the curve y =x -blank x to the power of 2 end exponent blankand the line y = mx equal to 9/2…

Maths-General
parallel

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