Element
What element has an atomic mass of 69.723
What is Gallium
The stairstep elements on the periodic table
Metalloids
Found in the nucleus of an atom.
Protons + neutrons
Salt dissolving into water is an example of what physical property?
Dissolving or solubility
Definition of Matter
Has Mass and Takes up space
This number stands for the number of protons.
What is the atomic number
Which element is the only one to have 0 neutrons?
Hydrogen
Neutrons and protons make up the nucleus and equal _.
What is the atomic mass?
Metal being hammered into shapes such as coins is an example of what physical property?
Malleability
Define proton
A positive subatomic particle (in the nucleus)
Copper (Cu)
Electrons are found here
electron cloud. OR outside the nucleus.
Determines the atomic number
What are protons?
True or False. Crushing peanuts to peanut butter is an chemical change.
False. Crushing peanuts into peanut butter is a PHYSICAL change.
The electrons in the furthest orbital out.
Atomic number of Tin
50
This element has 8 protons and needed for life.
What is oxygen?
list the 2 elements with 10 neutrons
Neon and fluorine
Is Metal wire conducting electricity to carry power throughout a house considered a chemical or physical property?
Physical Property. The metal does not change.
The number of protons in an atom. Top number on the periodic table.
True or False: The periodic table contains only elements found in nature.
False
What keeps an atom from floating away?
What is a positive charge of protons attracted to the negative charge of the electrons?
How do you find the name of an element if you only know the number of protons
Protons is equal to atomic number
Physical properties can be _______ or _______.
Observed or measure.
Define Mass
The amount of particles in an object