Question

Which of the following is an example of nuclear fission?
Answer

1n + 235U → 139Ba + 94Kr + 31n

90Sr → 90Y + e-

226Ra → 222Rn + 4He

2H + 3H → 4He + 1n

Answer 1

which reaction starts with a single large reactant splitting into multiple smaller products?

Answer 2

would it be the first one?

Answer 3

Can u eliminate any option acording to what @JFraser said ?

Answer 4

the last option

Answer 5

Good !
That's Fusion reaction

Answer 6

What about second reaction ?

Answer 7

yes i know that one

Answer 8

second also can be elimanted, stuck with 1 and 3

Answer 9

it is the first option isnt it

Answer 10

yes i think so

Answer 11

An atom of element X has an atomic mass of about 40; after reacting with a second atom of X, a different element (called Y) with an atomic mass of 80 is produced. What type of reaction is this?
Answer

fusion

fission

combustion

synthesis

Answer 12

i know it isnt fission or combustion right?

Answer 13

would this be synthesis

Answer 14

Why not fusion ?

Answer 15

two things combine to create a bigger mass, isnt that synthesis?

Answer 16

A synthesis reaction or direct combination reaction is one of the most common types of `chemical reactions`. In a synthesis reaction two or more chemical species combine to form a more complex product.

Answer 17

In synthesis reaction the final product is a compound

Answer 18

Here, a new element is formed which can only done by nuclear reaction.

Answer 19

so if a compound is formed its synthesis and if its a new element its fusion ?

Answer 20

yes.

Answer 21

thanks so much man

Answer 22

See option D of first question

Answer 23

Two smaller elements combined to form a bigger element. That's fusion reaction.

Answer 24

\(\rlap{\color{blue}{\huge\bigstar}\huge \color{blue}{ \text{You're Most Welcome! }}\color{blue}\bigstar}{\; \color{aqua}{\huge\bigstar}\huge \color{aqua}{\text{You're Most Welcome! }}\color{aqua}\bigstar}\)
\(~~~~~~~~~~~~~~~~~~~~~~~~~~~\color{green}{\huge\ddot\smile}\color{blue}{\huge\ddot\smile}\color{pink}{\huge\ddot\smile}\color{red}{\huge\ddot\smile}\color{yellow}{\huge\ddot\smile}\)

Answer 25

ha thats cool, thanks again. your helping my grade

Answer 26

Glad to know that :)

Answer 27

Which of the following are true for E = mc2?
Answer

developed by Albert Einstein

implies that a small change in mass produces a great deal of energy

mainly used for chemical reactions

implies that a small change is mass produces a small amount of energy
@Abhisar

Answer 28

two answers

Answer 29

Second one is the answer. C stands for the speed of light. So for loss of say 1Kg we get an energy equivalent to \(\sf (3\times 10^8)^2=9\times 10^{16}Joules\)

Answer 30

@gstprc

Answer 31

so A and C?