Answer is: 2. Chemical reactions involve the rearrangement of electrons and 5. Isotopes of the same element behave differently in a nuclear reaction.
1) The electrons of an atom participates in a chemical reaction.
2) Chemical reactions involve the rearrangement of electrons, because there is transfer, loss, gain and sharing of electrons in chemical reactions.
3) Nuclear reactions can produce new elements, because number of protons and neutrons is changed.
4) Chemical reactions require heat or an input of energy to occur, this is activation energy.
5) Isotopes of the same element behave differently in a nuclear reaction, because isotopes have different number of neutrons, so products of a nuclear reaction is different.
Answer:
because it covers a large area as there are more then 1 lakh compounds of organic chemistry.
Answer:
136.33 million mi
or
1.5 astronomical units (AU)
Explanation:
google
Answer: C. all particles of matter move very quickly
Explanation:
Heat is how fast the molecules are moving in something. This means even a solid's molecules are moving.
Answer:
Magnitude = 1.51 ×10^6m/s
Direction is to the north
Explanation:
Question:
If an electron in an electron beam experiences a downward force of 2.0 × 10^-14N while traveling in a magnetic field of 8.3 × 10^-2T to the west, what is the direction and magnitude of the velocity?
Solution:
F= 2.0 × 10^-14N
Magnetic force = B = 8.3 × 10^-2T
Let the charge, q= 1.6×10^-19
F = Bqvsinθ
v = F/(Bqsinθ)
v = 2×10^-14/(8.3 × 10^-2 × 1.6×10^-19 ×sin90)
v = 2×10^-14/(13.28×10^-21 × 1)
v = 2/13.28 × 10^-14/10^-21
v = 0.1506 × 10^(-14+21)
v = 0.1506 × 10^7 = 0.151 × 10^7
v = 1.51 ×10^6m/s
Force is going down
magnetic field points west
Using the right and rule:
Point your fingers towards the west, and your thumb will point north. Since this is an electron, use the back of your hand( turn your hand backwards). The thumb points north.
Velocity direction is north
