Atoms, Elements and Compounds Flashcards
(25 cards)
What are all substances made of?
Atoms
What is an element composed of?
Only one type of atom.
What are compounds made of?
Atoms of different elements bonded together.
What are positive ions called?
Cations.
What are negative ions called
Anions
what is a mixture?
Two or more elements or compounds not chemically bonded together.
For an atom, what is the relationship between protons and electrons?
Number of protons(+) = Number of electrons(-).
How do you calculate the number of neutrons in an atom?
Mass number – atomic number.
What do metal atoms do to form positive ions?
Lose electrons.
What are isotopes?
Different atoms of the same element that have the same number of protons but different numbers of neutrons.
What do Group VIII noble gases have?
A full outer shell.
What does the group number indicate?
Number of outer shell electrons.
What does the period number indicate?
Number of occupied shells.
What do non-metal atoms do to form negative ions?
Gain electrons.
What charge do Group 5 elements typically form?
3- ions.
What charge do Group 6 elements typically form?
2- ions.
havWhat charge do Group 7 elements typically have?
1- ions.
What is the mass number also known as?
Nucleon number.
What charge do Group 1 elements typically form?
1+ ions.
What charge do Group 2 elements typically form
2+ ions.
What happens to the name of a non-metal when it becomes an ion?
“-ide” is added to the element name.
What is an example of a non-metal changing its name to an ion?
Oxygen to oxide.
What is the naming convention for two elements?
When two elements form a compound, the second element’s name ends in…….
se ‘ide’, e.g., Na₂S = sodium sulfide.
What do ions have in common with noble gases?
same electron arrangement as the nearest noble gas. Gain or lose electrons to achieve a full outer shell, like noble gases.
