Download App

Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
Which of the following has the highest $n / p$ ratio:
  • A
    $^{3}_1\text{H}$
  • ✓
    $^{235}_{92}\text{U}$
  • C
    $^{14}_{6}\text{C}$
  • D
    $^{222}_{88}\text{Ra}$
✓

Answer

Correct option: B.
$^{235}_{92}\text{U}$
Every element has a proton, neutron, and electron. The number of protons is equal to the atomic number, and the number of electrons is equal the protons, unless it is an ion. To determine the number of neutrons in an element you subtract the atomic number from the atomic mass of the element.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 M]" from Structure of the Atom→Structure of the Atom — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Take a clean glass slide and put few drops of water on it. Now place a complete Rheo leaf on water droplets and examine the cells of leaf under the high power of compound microscope. Put a few drops of concentrated salt/sugar solution on the mounted Rheo leaf on the glass slide. Wait for few minutes and again observe the leaf under the high power of microscope.
What will be your observation after few minutes?
→
'When a hanging carpet is beaten with a stick, the dust particles start coming out of it'. This phenomenon can be best explained by making use of:
→
Rutherford’s alpha particle scattering experiment led to the discovery of:
→
In the Pila, the gastropod mollusk, the organ of the locomotion is:
→
In which type of cell division two identical daughter cells are formed:
→
Who first saw and described a live cell?
→
A particle is moving in a circular path of radius r. The displacement after half a circle would be:
→
Solar radiation heat$-$up:
→
A loaded spring produces __________ waves:
→
Simple tissues are these:
→