Quiz question pre test chapter 2
The atomic mass of an element represents the total number of
Correct protons + neutrons.
The atomic number of the element neon (Ne) is 10. How many electrons does a neutral atom of neon contain?
10
A covalent bond is formed when
a valence electron is shared between two atoms.
The atomic number of silicon (Si) is 14. Use the idea of energy shells to predict the number of covalent bonds that Si could form.
4
An ionic bond is formed when
An electrical attraction occurs between two atoms of different charge.
A hydrophilic substance is one that can
Dissolve in water.
What type of chemical bond is being broken when methane is burned?
Nonpolar covalent
What type of chemical bond is formed during a dehydration synthesis reaction?
Covalent
A sugar is an example of a __________ molecule while a molecule of DNA is a __________.
Carbohydrate; nucleic acid
The shape of a protein is determined by
All of the above.