chem syllabus flashcard

Front

What is Dalton's atomic theory regarding elements?

Back

Atoms of different elements have different masses and different properties.

Front

Who is known for using the cathode ray in experiments?

Back

Joseph J Thompson.

Front

What is the molecular mass (Mr) of ammonia (NH₃)?

Back

17.

Front

What did J J Thompson contribute to atomic theory?

Back

He devised a model of the structure of atoms from his studies on electrons and proposed that electrons were present in the atom.

Front

How is the concentration of a solution measured?

Back

In grams per litre (g/L), calculated using the formula: mass of solute (g) / volume of solution (L).

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What charge do protons carry?

Back

Positive charge.

Front

What is the charge of electrons?

Back

Negative charge.

Front

Where are neutrons located in an atom?

Back

In the nucleus, along with protons.