Science-Ch.6 Question Preview (ID: 44402)
Atomic Structure And Chemical Bonds
Need To Know Ph Of Bases, Acids, And Neutral Samples, And The Formula For Density On Own.
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What is the name given to the units that make up covalently bonded compounds?
a) molecules
b) ions
c) electrons
d) energy levels
Dot diagrams are used to represent
a) protons
b) outer electrons
c) atomic mass
d) the structure of the nucleus
In carbon dioxide, each oxygen atom shares four electrons with the carbon atom. What is this type of bond called?
a) triple covalent
b) double covalent
c) polar covalent
d) ionic
One of the chemical properties of bases is that they _____________.
a) taste sour
b) feel slippery
c) crumble
d) corrode metal
All of the following are examples of chemical weathering except ____________________.
a) acid rain
b) cave formations
c) rocks breaking because of ice
d) pollution
Which of the following statements about the atom is false?
a) Each atom has a tiny nucleus at its center.
b) All the protons and neutrons are located in the nucleus.
c) Electrons travel in definite circular pathways around the nucleus.
d) All atomic nuclei are positively charged.
What is the neutral particle that is formed when atoms share electrons?
a) caution
b) ionic compound
c) molecule
d) nucleus
All of the following are a state of matter EXCEPT _______________.
a) solid
b) gas
c) liquid
d) density
Which of the following is an example of a physical change?
a) evaporation in a swamp cooler
b) electricity produced by a dry cell
c) digestion of a hamburger
d) rusting of a car body
A charcteristic of matter that allows it to change to something new is a _____________.
a) physical property
b) physical change
c) chemical property
d) chemical change
The particles that make up an atom are _______________.
a) electrons, protons, and nuclei
b) elements, protons, and electrons
c) protons, neutrons, and nuclei)
d) protons, neutrons, and electrons
In the compound H2O2, the electrons in the bonds are unequally shared between oxygen and hydrogen, forming ______________.
a) cations
b) ionic bonds
c) nonpolar molecules
d) polar bonds
Which of the following is an example of a chemical change?
a) painting a house
b) freezing water
c) bending steel
d) baking soda in water
The following are examples of chemical properties except _________________.
a) the ability to burn
b) the ability to be crushed
c) the ability to react with oxygen
d) toxicity
The maximum number of electrons in the second energy level of an atom is ___________________.
a) two
b) four
c) eight
d) ten
Which of the following bonds is polar?
a) F-F
b) O-H
c) O-O
d) H-H
How many dots are shown in the electron dot diagram for calcium, element number 20?
a) one
b) two
c) eight
d) twenty
All of the following are examples of physical changes except ______________________.
a) melting
b) evaporating
c) burning
d) solidifying
The energy levels of an atom are occupied by _____________.
a) electrons
b) protons
c) neutrons
d) ions
Density is an example of a ______________________.
a) chemical property
b) chemical change
c) physical property
d) physical change
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