The reason a granite block is mostly empty space is because the atoms in the granite are:
Held together by electrical forces
Invisible
Mostly empty space themselves
Not as close together as they could be
Compared to the mass of a hydrogen atom, the mass of an oxygen atom is _____ times greater
8
12
16
32
The chemical properties of matter comes mostly from its
Neutrons
Valence electrons
Protons
Neucleous
An excited atom decays to its ground state and emits a photon of green light. If instead, the atoms decays to an intermediate state, then the light emitted could be:
Violet
White
Blue
Red
How many electrons are found in the outermost shell of aluminum (Al, atomic number 13)?
2
3
5
When radium (atomic number 88) emits an alpha particle, the resulting nucleus has atomic number.
92
90
88
86
Which experiences the least electrical force in an electric field?
Electron
Beta particle
Gamma ray
Alpha particle
Which film recently became the first from Bollywood to open within the top 10 in the US and Canada?
Kites
Rajneeti
Hera Pheri
Blue Oranges
What was George Eastman's favourite letter?
A
K
X
None of these
Which company calls itself the 'largest pencil manufacturing company in India'?
Nataraj
Hindustan Pencils
Camel