Atoms,compounds,isotopes Flashcards
What does the mass number tell you?
Total number of protons and neutrons
What does a atom contain?
Protons, neutrons and electrons
What does the atomic number tell you?
How many protons there are
What is the particle mass for protons,neutrons,electrons
Protons: 1
Neutrons: 1
Electrons: very small (0.3)
What is a compound?
A compound is 2 or more elements and chemically combined together
What is an isotope?
Different atomic forms of the same element, which have the same number of protons but different number of neutrons
What is meant by ionic bonding?
Ionic bonding is when a element loess or gains an electron to form a charge particle (ions)
What is the structure of an ionic compound
Regular lattice structure
What is the force of attraction in ionic compounds?
Very strong electrostatic forces of attraction between opposite charged ions in all directions
What are the properties of ionic compounds
High melting points
High boiling points
Strong attraction between ions
Why can ionic compounds carry electricity
Because it has a free electron which is able to carry a current
What is an alloy?
A mixture of 2 or more atoms
