Q.1.
How many energy levels does chlorine have?
Q.2.
How many protons does magnesium have?
Q.3.
What is the atomic number of silicon?
Q.4.
What is the chemical symbol for oxygen?
Q.5.
What is the chemical symbol for oxygen?
Q.6.
In what part of the atom is the electron found?
Q.7.
In what part of the atom is the electron found?
Q.8.
What is the electrical charge on a electron?
Q.9.
What is the electrical charge on a proton?
Q.10.
What is the electrical charge on a proton?
Q.11.
A pure substance that is made up of two or more types of atoms that are joined together is called a(n) _____________________.
Q.12.
A pure substance that is made up of two or more types of atoms that are joined together is called a(n) _____________________.
Q.13.
Water is a _______________ because it can be broken down into the _____________ oxygen and hydrogen.
Q.14.
Water is a _______________ because it can be broken down into the _____________ oxygen and hydrogen.
Q.15.
Substances that contain particles that are the same throughout are
Q.16.
Substances that contain particles that are the same throughout are
Q.17.
A _____________ can be solid, brittle, non-conductive, and dull.
Q.18.
A _____________ can be solid, brittle, non-conductive, and dull.
Q.19.
A star that could float on water,
Q.20.
Bags made out of cellulose eventually dissolve in water. This means that they are