Science Ch. 8 Flashcards
True or False: Atoms of different elements have different numbers of protons
True
True or False: To become more chemically stable, an atom that had two electrons in its outer energy level will gain 2 electrons
False
True or False: Nonpolar molecules have a slight negative charge on one end and a slight positive charge on the other
False
Why is water a noncovalent bond?
Water is two nonmetal atoms which share electrons, forming a molecule.
Dot diagrams are used to represent _______.
Outer electrons
The energy levels of an atom are occupied by _______.
Electrons
Aluminum oxide is a chemical formula with two aluminum atoms and three oxygen atoms. Which is the correct chemical formula?
Al²O³
The number of electrons in the second energy level of an atom
8
Aspartame is an artificial sweetener, its formula being C¹³H¹⁶N²O⁵. Which of all these elements has the greatest quantity??
Hydrogen
A type of atom that has lost or gained electrons
Ion
Atoms that gain electrons become ions with a _______ charge
NEGATIVE (u better know this, we better not fail)
The particle of glucose, 2C⁶H¹²O⁶ contains ___ atoms
48
The molecule alanine, C³H⁷NO² contains _____ amount of different elements
4
The compound 2Fe²O³ is made of __ different elements
2
When Ba+2 binds with OH-, the compound ____ forms
BaF²
When Mg+2 binds with OH-, the compound _____ forms
Mg(OH)²
When Pb+4 binds with SO4-², the sompound _____ forms.
Pb(SO4)2
Charged atom that has gained one or more electrons
Negative Ion
Bond that holds a positive metal ion and negative nonmetal ions together
Ionic Bonds
The thing that represents an element
Symbol
Represents the number of atoms in a chemical formula
Subscript
A charged atom that has lost one or more electrons
Positive ion
Bond that holds nonmetal atoms together by sharing electrons
Covalent Bonds
Bond that holds atoms together by sharing pooled valence electrons
Metallic Bond
Find nitrogen’s (atomic number 7) Valence electrons, make a Lewis Dot Diagram, and identify the appropriate reaction
VE: 5 LDD: N with 5 dots around it Rxn: gain 3 electrons
To find valence electrons, make a Bohr model, the last energy level, the quantity of electrons = valence electrons
Alrr, I’ll remember, (we better, don’t be a failure :))
