Test Practice 1
Test Practice 2
Test Practice 3
Test Practice 4
Test Practice 5
100
How many atoms of calcium are in the formula Ca3PO4?
3
100
many dots are shown in the electron dot diagram for calcium, element number 12?
2
100
substance that contains two or more elements
Compound
100
The compound sulfuric acid, H2 S O4, is made up of the elements ____________________, sulfur, and oxygen
Hydrogen
100
The formula Ca3Po4 contains this many atoms of Phosphorous.
What is 4
200
Aspartame is an artificial sweetener; its formula is C13 H16 N2 O5. Which element in the formula has the largest number of atoms?
H16
200
Which of the following elements will likely form a negative ion (gain an electron) in its ionic compounds? a. Li, lithium c. Mg, magnesium b. Al, aluminum d. Cl, chlorine
d. Cl, chlorine because it needs one more electron to fill it's outermost shell.
200
The chemical symbol for the element strontium is
Sr
200
The element phosphorus has ____________________ valence electrons in its outermost energy level.
5
200
What will be the charge of each atom in LiF be in ionic bonding?
LI 1+ F 1-
300
Valence refers to the number of what?
Electrons on the outer shell
300
Which term best describes the substance that is represented by the chemical formula Hg? a. compound c. ion b. element d. nonmetal
b. Element
300
The chemical symbol for the element tin is
Sn
300
____________ dot diagrams are used to show how electrons behave in a chemical bond.
Lewis
300
What will be the charge of each atom in Mg Cl2 be in ionic bonding?
Mg 2+ Cl 1- Cl 1-
400
Which of the following compounds is NOT likely to have ionic bonds? a. LiF c. CH4 b. NaCl d. MgF2
C. CH4
400
positively charged center of atom
Nucleus
400
A molecule of table sugar, C12 H22 O11, contains ____________________ atoms total.
45
400
Ionic compounds are formed by ________ of electrons between atoms
transferring
400
What will be the charge of each atom in Na2 O be in ionic bonding?
Na 1+ Na 1+ O 2-
500
What is the group number for elements that have a stable number of electrons in their outer energy level?
Group 18
500
atoms joined together by sharing electrons
Covalent bond
500
The compound alanine, C3 H7 No2, is made up of ____________________ different elements.
3
500
What is the difference between an ionic bond and a covalent bond?
Ionic bonding is when atoms transfer electrons Covalent bonding is when atoms share electrons
500
What will be the charge of each atom in Mg f2 be in ionic bonding?
Mg 2+ F 1- F 1-
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