Science study flashcards 4
(21 cards)
What is a compound
is a pure substance that is formed when two or more elemenst are chemically combine with each other
Give me an example for a compound and explain it
ammonia is formed by combining the elements nitrogen and hydrogen
What is the molecule formula for ammonia
NH3
A particle that consists of more than one chemically bonded atom is called a…
molecule
The ratio in which the elements are connected are indicated with…
footnotes in the formula
What are the smallest building blocks of compounds
molecules
What are molecules
smallest particles of covalent compounds and they consist of two or more atoms chemically bonded together
Molecules of the same compound are …
alike and consist of the same number of each kind of atom
Elements in nature do not …
occur as separate atoms
Why are metals written as a single symbol
because they consist of a large number of atoms trapped in a metal lattice
What does the element iron exist from
from a large number of iron atoms that strongly attract each other and form a piece of iron
How do certain non-metals attract each other
they attract each other one by one to form relevant non-metal, which are chemically bonded together as molecules
What is the orthohombic formula for sulfur
S8
What do noble gasses always occur as
occur as atoms in nature that don’t participate in any chemical bonding
What are noble gasses never part of
they are never part of a chemical reaction
What does a diatomic molecule consist out of
consists of molecules where two of the same atom chemically bond
Diatomic molecules must never be left …
alone
Formula for hydrogen
H2
Formula for water
H2O
Formula for methane
CH4
Formula for carbon dioxide
CO2
