Elements Flashcards
Name the first 20 elements of the periodic table in order.
Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminium, silicon, phosphorus, Sulfur chlorine, argon, potassium, calcium.
Write the chemical symbol for the first 10 elements.
H=hydrogen He= helium Li= lithium Be= beryllium B= boron C= carbon N= nitrogen O= oxygen F= fluorine Ne= neon
Name the first 10 elements of the periodic table in order.
Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon.
What is a mixture?
Two or more substances that are chemically combined with each other and can be separated by physical means.
What are elements?
Elements are the simplest form of a pure substance. (Cannot be broken down by physical or chemical means).
What is a compound?
Pure substances that are the unions(uniting) of two or more elements. (Can be broken down by chemical means).
What is a solution?
A special kind of mixture where one substance dissolves in another.
What are electrons?
Negatively charged particles.
What are protons?
Positively charged particles.
What are neutrons?
Neutrons have no electrical charge. They are neutral.
What determines the nature of a chemical element?
Number of protons.
What determines the position of an element in the periodic table?
The number of protons.
What does the atomic number equal to?
Atomic number = number of protons in the nucleus of atom (Z).
Mass number is equal to?
Mass number=number if particles in a nucleus.
How do you figure out the mass number?
Mass number=number of protons + number of neutrons. (A=P+N)
What is the last shell of the model of the atom called?
Valence shell.
How many electrons can the valence shell hold?
Up to 8 electrons.
What is a covalent bond?
A chemical bond created by the sharing of a valence electron between two atoms.
What is a diatomic molecule?
Two atoms bonded by covalent bonds.
What is a polyatomic molecule?
More than two atoms bonded.
What is a molecule of an element?
Same type of elements.
