DA 2 Review

Front

What is alpha decay?

Back

Alpha decay is a type of radioactive decay in which an unstable nucleus emits an alpha particle (2 protons and 2 neutrons), resulting in a new element with a lower atomic number.

Front

What is the product of polonium-210 undergoing alpha decay?

Back

When polonium-210 undergoes alpha decay, it produces lead-206 (Pb-206).

Front

What is the formula for calcium nitrate?

Back

The formula for calcium nitrate is Ca(NO₃)₂.

Front

What determines the similar properties of elements in the periodic table?

Back

Elements in the same group (column) of the periodic table have similar properties due to having the same number of valence electrons.

Front

What happens to the temperature of an object when it is removed from a heat source?

Back

The temperature of the object will decrease gradually until it reaches thermal equilibrium with its surroundings.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom or ion in its gaseous state.

Front

Arrange the following elements in order of increasing ionization energy: Na, Li, K, Rb, Cs.

Back

The order of increasing ionization energy is Cs, Rb, K, Na, Li.

Front

What is the significance of the periodic table in chemistry?

Back

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

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound consists of two or more elements chemically combined.