Chem Test 2 Notes chapter 4
Elements
1) The primary substances of which all other things are composed are ________.
calcium, phosphorous, oxygen, hydrogen
11) What elements are in hydroxyapatite, Ca5(PO4)3OH, a major compound in human bones and teeth?
The elements in each group have similar chemical properties.
12) Which of the following is a characteristic of the modern periodic table? A) A group is a horizontal row on the periodic table. B) A period is a column on the periodic table. C) The elements in each group have similar chemical properties. D) The B groups contain the representative elements. E) The A groups contain the transition elements.
Most of them are liquids at room temperature.
13) Which of the following properties is not a characteristic of the Group 1A (1) elements (alkali metals)? A) They are shiny. B) They are good conductors of heat. C) They react vigorously with water. D) Most of them are liquids at room temperature. E) They are good conductors of electricity.
A) are unreactive and are rarely found in combination with other elements
14) The Group 8A (18) elements ________.
strontium
15) Which of the following elements is a metal? A) nitrogen B) fluorine C) argon D) strontium E) phosphorus
nitrogen
16) Which of the following elements is a nonmetal? A) nitrogen B) sodium C) iron D) silver E) calcium
silicon
17) Which of the following elements is a metalloid? A) nitrogen B) lithium C) iron D) gold E) silicon
low melting points
18) Which of the following is a characteristic of nonmetals? A) shiny B) malleable C) good conductors of heat D) low melting points E) good conductors of electricity
argon
19) Which of the following elements is a noble gas? A) oxygen B) chlorine C) bromine D) argon E) nitrogen
gold
2) Au is the symbol for ________.
are in the same group
20) The elements lithium, sodium, and potassium ________. A) are isotopes of each other B) are in the same period of elements C) have the same number of neutrons D) are in the same group E) have the same mass number
are in the same period of elements
21) The elements sodium, magnesium, and silicon ________. A) are isotopes of each other B) are in the same period of elements C) have the same number of neutrons D) are in the same group E) have the same mass number
Br
22) Which element would have physical and chemical properties similar to chlorine? A) Ar B) Br C) S D) O E) P
C
23) What is the symbol of the element in Group 4A (14) and Period 2?
strontium
24) The element in this list with chemical properties similar to magnesium is ________. A) sodium B) boron C) carbon D) strontium E) chlorine
helium
25) Identify the noble gas in the following list. A) helium B) nitrogen C) oxygen D) gold E) chlorine
calcium
Ca
Au
Gold
Fe
Iron
Hg
Mercury
K
Potassium
Ag
Silver
Na
Sodium
Al
aluminum
