An element X has the 4th shell as the valence shell. If the difference in the number of electrons between K and N shells and between L and M shells is zero, then the atomic number of the element X will be
it would be (d) because if 4 shells are present in an atom then rest of the answers don't make sense !!!!
Which of the following statements are correct?
1. Vitamin A helps to make our bones and teeth strong.
2. Iron helps in the formation of blood.
3. Potassium is present in sprouts and bananas.
4. Vitamin D helps in wound healing and found in whole grains.
A 1 and 3 only
B 2 and 3 only
C 3 and 4 only
D 2 and 4 only
Refer to the given word grid and answer the following questions.
How many of these fibres are obtained from animals?
Thanks for the answer
Rahul gets an assignment to make a list of fabrics made of different fibres. He takes pieces of fabric X and Y and burns them to identify the fibre. Fibre X burns with smell of charred meat and fibre Y burns with smell of burning hair. Identify the fabrics X and Y.
ans is B
Digit at the tens place in the number that comes as a difference between 5 hundreds 6 tens 13 ones and 7 hundreds 2 tens 15 ones is _________.
can anyone explain this solution
Two satellites S1 and S2 revolve around a planet in coplanar circular orbits in the same sense. Their periods of revolution are 1 h and 8 h respectively. The radius of the orbit of S1 is 104 km. When S2 is closest to S1, then the speed of S2 relative to S1 will be
Aπ × 104 km h-1
B2π × 104 km h-1
C1 × 104 km h-1
D2 × 104 km h-1
could anyone give me a detailed solution for this?