Chemistry Midterm 2024

Front

What is the order of electromagnetic radiation from least to most energetic?

Back

radio, microwave, ultraviolet, gamma

Front

Who proposed the model of the atom that includes electrons embedded in a positively charged 'soup'?

Back

Thomson

Front

Balance the equation: PbCl₃ + Ca(OH)₂ → CaCl₂ + Pb(OH)₃. What are the coefficients?

Back

2, 3, 3, 2

Tags

NGSS.HS-PS1-7

Front

What type of reaction involves two or more substances combining to form a new compound?

Back

Combination (synthesis) reaction

Front

What was Henry Moseley's contribution to the periodic table?

Back

Providing a basis for ordering elements in the periodic table based on atomic number.

Front

Define electromagnetic radiation.

Back

Electromagnetic radiation is a form of energy that travels through space at the speed of light and includes a range of waves such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

Front

What is a single replacement reaction?

Back

A chemical reaction where one element replaces another in a compound.

Front

What is a decomposition reaction?

Back

A chemical reaction where a single compound breaks down into two or more simpler products.

Tags

NGSS.MS-PS1-5

Front

What is a combustion reaction?

Back

A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat.

Tags

NGSS.HS-PS1-4

Front

What is the significance of atomic number in the periodic table?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.