Tag: math & puzzles

The reason a granite block is mostly empty space is because the atoms in the granite are:

Compared to the mass of a hydrogen atom, the mass of an oxygen atom is _____ times greater

The chemical properties of matter comes mostly from its

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:

How many electrons are found in the outermost shell of aluminum (Al, atomic number 13)?

When radium (atomic number 88) emits an alpha particle, the resulting nucleus has atomic number.

Which experiences the least electrical force in an electric field?

Which film recently became the first from Bollywood to open within the top 10 in the US and Canada?

What was George Eastman's favourite letter?

Which company calls itself the 'largest pencil manufacturing company in India'?