END OF SEMESTER 1 CHEMISTRY EXAM

Front

What is the balanced equation for a chemical reaction?

Back

A balanced equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What is an orbital diagram?

Back

An orbital diagram is a visual representation of the electron configuration of an atom, showing the distribution of electrons in atomic orbitals.

Front

How many atoms are in C3H5(NO3)3?

Back

C = 3, H = 5, N = 3, O = 9.

Front

How many protons does an aluminium atom have?

Back

An aluminium atom has 13 protons.

Front

What did Rutherford's alpha scattering experiment discover?

Back

Rutherford's alpha scattering led to the discovery of the nucleus.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that involves the transformation of one or more substances into different substances.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

What is a mole in chemistry?

Back

A mole is a unit that measures the amount of a substance, defined as containing exactly 6.022 x 10^23 particles.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.