In ionic bonding, electrons
Question 1
In ionic bonding, electrons _____ .
play no role
are shared between atoms
are transferred between atoms
Question 2
Groups on the periodic table list elements with similar properties.
True/ False
Question 3
Which of the following amounts is closest to the molar mass of C18H25NO?
128.44 g
1.30 lbs
200 g
1.9419 kg
Question 4 8 / 8 points
____ are examples of transition metals.
calcium and magnesium
carbon and hydrogen
iron and nickel
sodium and chlorine
Question 5
Elements in the same period on the Periodic Table will have the ____ .
same number of electrons
same number of protons
increasing number of protons as they move across the period
decreasing number of protons as they move across the period
Question 6
The ion Cl- is an example of ____ .
an atom
a cation
a molecule
an anion
Question 7
If an asteroid fragment contains carbon, it may burn when entering Earth’s atmosphere. The most likely compound to result from this process is ______ . The type of chemical bond resulting from this process is a ______ bond. Of the types of chemical reactions studied in this course, this would this be a ______ reaction.
carbon monoxide, covalent, acid base
carbon dioxide, covalent, exothermic
methane, ionic, endothermic
ammonia, ionic, redox
Question 8
Isotopes of an element have the same number of _____ .
protons but different numbers of neutrons
protons and neutrons
neutrons and electrons
neutrons but different numbers of protons
Question 9
In covalent bonding, electrons are _____ atoms.
shared between
expelled from
transferred between
Question 10
The formula of the ionic compound that forms from two ions, A2+ and R7-, can be written as AxRy. What is the value for x?
Only enter your numerical answer for x below. Your answer must be a whole number.
Answer:
Question 11
A specific radioactive isotope has a half-life of 27.2 minutes. How long will it take this isotope to decay to 1/8 of its original amount?
Only enter your numerical answer below – do not include units. Report your answer to 2 decimal places.
Answer:
Question 12
Two short-lived isotopes of an element are produced in a nuclear reaction. One of these isotopes has a mass of 5.3731 amu and accounts for 75.5% of the production. The remaining other isotope has a mass of 7.3904 amu. Use this information to calculate the atomic mass of this element.
Only enter your numerical answer below – do not include units. Report your answer to 2 decimal places.
Answer:
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