Cause A Reaction
This group of elements are the least reactive.
What are NOBLE gases (Group 8A)?
The sum of the protons and neutrons in the nucleus of an atom.
A substance that has a definite shape and a definite volume.
What is SOLID?
The weakest type of bond.
What is a HYDROGEN bond
Columns within the periodic table have similar characteristics but are not identical.
What are GROUPS?
These particles in the nucleus are neutral.
What are NEUTRONS?
The speed of its particles slows down.
What is cooling of a substance?
Substances that undergo a chemical change.
What is the REACTANTS?
Some chemical bonds transfer electrons.
What is IONIC bonding?
This group of elements are the most reactive
What are ALKALI Metals (Group 1A)?
The elements in Group 6A have 6 valance electrons.
What is the OXYGEN group?
These substances have a fixed composition and always have the same properties because its composition never changes.
What are PURE SUBSTANCES?
An atom or group of atoms that has a positive or negative charge.
A force of attraction between atoms or a group of atoms due to the sharing or transferring of electrons.
These electrons live in the highest energy level.
What are VALANCE ELECTRONS?
The elements in Group 3A have 3 valance electrons, making them less reactive than alkaline earth metals.
(You can look at the periodic table.)
What is the BORON Group?
This is evidence of a physical change due to heat.
What is MELTING?
A molecule that has slight positive and negative charge due to an imbalance in the way electrons are shared.
What is a POLAR MOLECULE?
The force of attraction between molecules of different substances so that they tend to stick together.
What is ADHESION?
He was responsible for organizing the first periodic table.
Who was Mendeleev?
This group is required for life. All the reactions that occur in your body are controlled by this group.
What is the CARBON group?
Cutting your hair is an example of this kind of change.
What is PHYSICAL change?
What type of bond occurs when two nonmetal atoms share valence electrons?
What is a COVALENT bond?
When two atoms share three pairs of electrons, they have this type of bond.
What is a TRIPLE bond?