Download presentation
Presentation is loading. Please wait.
Published byGillian Lora Johnston Modified over 9 years ago
1
Physical Science Pre-Test Chapter 19
2
Each letter or pair of letters is a _______ _______. Chemical symbol
3
Know your chemical symbols and chemical names.
4
A _______ is a combination of two or more elements. compound
5
_______ means written below. What two things does a chemical formula tell? subscript
6
_______ _______ tells which elements and the ratio of the atoms of those elements. Chemical formula
7
An element is _______ _______ if the outer energy level is completely filled. Chemically stable
8
_______ is the maximum number of electrons in an elements outermost energy level. 8
9
_______ _______ is a force that holds together the atoms in a substance. Chemical bond
10
Does a compound always have the same properties as the elements that make it up? NO
11
_______ _______ are the electrons in the outermost energy level. Valence electrons
12
_______ _______ are more chemically stable than other elements because they have a complete outer energy level. Noble gases
13
Why do most elements tend to form compounds? To become chemically stable
14
_______ are atoms that have a charge. Ions
15
_______ _______ is the force of attraction between the opposite charges of the ions in an ionic compound. Ionic bond
16
The result of bonding is a net charge of ________. zero
17
_______ is a positively charged ion. cation
18
_______ is a negatively charged ion. anion
19
_______ _______ is the attraction that forms between atoms when they share electrons. Covalent bonds
20
_______ means “having oppositely charged ends.” polar
21
_______ _______ is a molecule that has a positive end and a negative end. Polar molecule
22
_______ _______ is a molecule that does not have oppositely charged ends. Nonpolar molecule
23
_______ _______ is the apparent charge on an element. Oxidation number
24
_______ _______ is a positive or negative number assigned to an element to show its combining ability in a compound. Oxidation number
25
Left to Right across the periodic table, the number of valence electrons goes __________. 1, 2, 3, 4, 5, 6, 7, 8
26
Left to Right across the periodic table, oxidation numbers go _______________ ______. +1, +2, +3, ±4, -3, -2, -1, 0
27
_______ means two. bi
28
_______ compounds are composed of two elements. binary
29
State the rules for writing formulas for binary compounds. See notes
30
Be able to write chemical formulas when given a pair of elements. See notes
31
State the rules for naming binary compounds. See notes
32
Be able to name compounds when given a chemical formula. See notes
33
The net charge on a compound is always _______. zero
34
_______ _______ is a positively or negatively charged, covalently bonded group of atoms. Polyatomic ion
35
_______ is a compound that has water chemically attached to its ions. hydrate
36
Chemists use _______ from the periodic table to write formulas for compounds. symbols
37
_______ means “many.” poly
38
Know the Polyatomic ions. See pg 591
39
Know the prefixes used in naming molecules. See pg 593
40
Be able to name and make compounds with the Polyatomic ions. See notes
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.