Studying physical property of water

Question

Assignment:

Question 1. If matter is uniform throughout and cannot be separated into other substances by physical means, it is _______.

• a compound
• an element
• a homogeneous mixture
• either an element or a compound
• a heterogeneous mixture

Question 2. Which one of the following is not a physical property of water?

• Water exists in solid, liquid and gaseous forms.
• It boils at 100oC at a pressure of 1 atm.
• It is clear and colorless.
• It freezes at 0oC.
• It reacts rapidly with potassium metal to form potassium hydroxide.

Question 3. 1 milligram = _____ micrograms

• 1,000
• 10
• 0.1
• 0.01
• 0.001

Question 4. The density of silver is 10.5 g/cm3. What volume (cm3) would be occupied by a piece of silver with a mass of 61.3 g?

• 0.00155
• 644
• 0.171
• 10.5
• 5.84

Question 5. In the Rutherford nuclear-atom model, _______.

• the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass and mass is spread essentially uniformly throughout the atom
• mass is spread essentially uniformly throughout the atom the light subatomic particles, protons and neutrons, reside in the nucleus
• the heavy subatomic particles, protons and neutrons, reside in the nucleus
• the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass

Question 6. An atom of the most common isotope of gold, 197Au, has _____ protons, _____ neutrons, and _____ electrons.

• 79, 197, 197
• 118, 79, 39
• 79, 118, 118
• 79, 118, 79
• 197, 79, 118

Question 7. All atoms of a particular element contain the same number of _______.

• protons and neutrons
• subatomic particles
• protons
• neutrons
• protons, neutrons, and electrons

Question 8. In the symbol below, x = _____.

• 13
• 6
• 19
• 7
• Not enough information to determine

Question 9. In the periodic table, the elements are arranged in __________.

• order of increasing atomic number
• order of increasing metallic properties
• alphabetical order
• reverse alphabetical order
• order of increasing neutron content

Question 10. Elements in Group 7A are known as the _______.

• halogens
• alkaline earth metals
• alkali metals
• noble gases
• chalcogens