Atomic Structure and Electron Behavior June 24

Front

What is a polyatomic ion?

Back

A polyatomic ion is a charged species (ion) composed of two or more atoms covalently bonded, which can be considered as a single unit. Examples include sulfate (SO4^2-) and ammonium (NH4^+).

Front

What does STP stand for in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere (101.3 kPa) of pressure.

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 and its position in the periodic table.

Front

What is the charge of a proton?

Back

A proton has a positive charge of +1 elementary charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

What is the overall charge of a fluorine atom's nucleus?

Back

The overall charge of a fluorine atom's nucleus is +9, due to its 9 protons.

Front

What is the mass of a neutron?

Back

A neutron has a mass of approximately 1 atomic mass unit (amu).

Front

What is the mass of a proton?

Back

A proton has a mass of approximately 1 atomic mass unit (amu).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms or grams, while weight is the force exerted by gravity on that mass, measured in newtons.

Front

What is the formula for calculating density?

Back

Density is calculated using the formula: Density = Mass/Volume.