SNC 2D0 Exam Review Science
SNC 2DO EXAM REVIEW January 2014
The exam is based on the entire semesters work.
Chemistry
1. Label the following on a periodic table: a) Alkali metals b) Alkaline earth metals c) Halogens d) Noble gases
2. Indicate the metals, non-metals and metalloids.
-38100431803. Show the trends for reactivity and atomic radius.
4. Which of the following elements has the largest atomic radius? Why? a) fluorine b) oxygen c) nitrogen d) calcium
Calcium has the largest atomic radius as it has 3 rings of electrons, while the rest of the listed elements have 1.
5. Which of the following elements has the largest atomic radius? Why? a) Be b) C c) N d) O
All 4 elements have the same atomic radius as all 4 elements have only 1 shell.
6. Arrange the following in order of increasing reactivity: Sc, Nb, Li, Ca, Na, Os. Explain your choices.
Os, Nb, Sc, Ca, Li, Na.
In metals, reactivity decreases as you go from left to right across a period and increases as you go down a group.
7. Using the periodic table, identify an element which has seven valence electrons.
All of the Halogens have seven valence electrons.
Example- fluorine, chlorine.
8. Which of the following has the smallest atomic radius? a) S b) Se c) O d) Te oxygen has the smallest atomic radius as it has only one shell.
9. What is an ion?
An ion is an atom that has become stable by gaining or losing electrons.
10. A positive ion is called cation and a negative ion is called anion.
11. Ionic bonds form between a metal and a non metal.
12. Covalent bonds form between two non-metals.
13. What is a polyatomic ion? How do you recognize a polyatomic ion in the NAME of a compound?
A polyatomic ion is a group of atoms which act as a single ion. All polyatomic ions (except ammonium and hydroxide) have the suffix –ate.
14. The roman numeral in the name of a compound indicates the charge on multivalent elements.
15. For the following compounds: i) identify if
The exam is based on the entire semesters work.
Chemistry
1. Label the following on a periodic table: a) Alkali metals b) Alkaline earth metals c) Halogens d) Noble gases
2. Indicate the metals, non-metals and metalloids.
-38100431803. Show the trends for reactivity and atomic radius.
4. Which of the following elements has the largest atomic radius? Why? a) fluorine b) oxygen c) nitrogen d) calcium
Calcium has the largest atomic radius as it has 3 rings of electrons, while the rest of the listed elements have 1.
5. Which of the following elements has the largest atomic radius? Why? a) Be b) C c) N d) O
All 4 elements have the same atomic radius as all 4 elements have only 1 shell.
6. Arrange the following in order of increasing reactivity: Sc, Nb, Li, Ca, Na, Os. Explain your choices.
Os, Nb, Sc, Ca, Li, Na.
In metals, reactivity decreases as you go from left to right across a period and increases as you go down a group.
7. Using the periodic table, identify an element which has seven valence electrons.
All of the Halogens have seven valence electrons.
Example- fluorine, chlorine.
8. Which of the following has the smallest atomic radius? a) S b) Se c) O d) Te oxygen has the smallest atomic radius as it has only one shell.
9. What is an ion?
An ion is an atom that has become stable by gaining or losing electrons.
10. A positive ion is called cation and a negative ion is called anion.
11. Ionic bonds form between a metal and a non metal.
12. Covalent bonds form between two non-metals.
13. What is a polyatomic ion? How do you recognize a polyatomic ion in the NAME of a compound?
A polyatomic ion is a group of atoms which act as a single ion. All polyatomic ions (except ammonium and hydroxide) have the suffix –ate.
14. The roman numeral in the name of a compound indicates the charge on multivalent elements.
15. For the following compounds: i) identify if