Unit 1 Flashcards
What is an element
An element is a substance made from one type of atom
What is a compound
A compound is when 2 or more different elements chemically join or bond together
How many solid ,liquid and gas are in the perdic table
105 solid,
2 liquid,
11 gas
What is mass number
The number proton + neutron are in a nucleus
What are proton , neutrons and electrons called
Sub atomic praticles
Why are atom electrically neutral
They have the same number of proton and electrons
What are isotope
Isotope are atom the have the same number of proton but different number of neutron
What is relative atomic mass
The average mass taking into account the mass number and abundance of all isotope
What is a covalent bond
A covalent bond exists between non metals Atom only
If the atoms are the same as each are called
Elements
atom different from each other are called
Compounds
What is a covalent bond
A covalent bond is a strong bond formed by the attraction between shared negatively charged electrons and positive nucle
What is is mass unit of proton and neutron
1 atomic mass unit
In a neutral atom the number of _________is _____ to the number of _____
In a neutral atom the number of
electrons is equal to the number of protons
What is nuclide notation used to show
Nuclide notation is used to show the atomic number, mass number (and charge) of atoms (ions)
from which the number of protons, electrons and neutrons can be determined.
