Ammonia molecule contains one nitrogen atom and three atoms of
A. hydrogen
B. helium
C. nitrogen
D. carbon
Related Questions on Chapter 2: Atoms Molecules & Ions - Science Mcqs for Grade 7
Smaller particles in an atom are called
A. atomic particles
B. subatomic particles
C. smaller particles
D. neutral particles
A. chemical formula
B. molecular formula
C. structural formula
D. atomic formula
A modern model of an atom shows that electrons are present outside nucleus in the region of high
A. probability
B. velocity
C. speed
D. energy level