Element, Compound, or Mixture?
Made of identical atoms.
What is an element?
This state of matter has a definite shape.
What is a solid?
The percentage of oxygen in air.
What is 21%?
The smallest part of an element that still retains all of the properties of an element is called this.
What is an atom?
This is the element symbol for oxygen.
What is O?
Two or more elements chemically combined.
What is a compound?
This state of matter does not have a definite volume.
What is a gas?
The formula for oxygen in the air.
What is O2?
The particle in the nucleus that is electronically neutral.
What is a neutron?
If Oxygen has 8 protons, how many electrons does it have?
What is 8?
Two or more substances mixed evenly together in a uniform fashion.
What is a homogeneous mixture?
In this state of matter, particles are the most compact.
What is a solid?
The major component of air.
What is nitrogen?
T/F: John Dalton stated that matter is destroyed during nuclear processes.
What is false?
The number of neutrons in Hydrogen.
What is 0?
Water is an example of this.
What is a compound?
In this state of matter, particles move the fastest (not including plasma).
What is a gas?
The number of bonds between two oxygen molecules.
What is 2?
In a neutral atom, the number of electrons always equals this.
What is the number of protons?
The number of protons in nitrogen.
What is 7?
Gold is an example of this.
What is an element?
The temperature at which a solid changes to a liquid.
What is melting point?
The percent of argon in clean, dry air.
What is 0.94%?
These two particle are located in the nucleus of an atom.
What are protons and neutrons?
The number of neutrons in one atom of silver.
What is 61?