a+p lecture ch 2 test
Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.
1. Electron: Negatively charged subatomic particle .2. Neutron: Neutral subatomic particle. 3. Atom: Smallest particle of an element that retains its properties. 4. Proton: Positively charged subatomic particle. 5. Electron: Subatomic particle having an AMU (Atomic Mass Unit) of zero.
An acid with a pH of 6 has ________ hydrogen ions than pure water.
10 fold more
What is the primary energy-transferring molecule in cells?
ATP
Which four elements comprise approximately 96% of our body weight?
Carbon, hydrogen, oxygen and nitroge
The four elements that make up about 96% of body weight are ________.
Carbon, hydrogen, oxygen and nitrogen
Which response provides the best explanation as to why ionic compounds easily dissociate in water?
The polarity of water easily breaks the charges between the oppositely charged ions in the compound.
What does CH4 mean?
There is one carbon and four hydrogen atoms.
Which of the following statements is FALSE?
When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases. Submit
Water is an important molecule because it __________.
can form hydrogen bonds
The three atoms shown represent three unique __________.
elements
Which of the following is NOT a subatomic particle?
molecule
Which of the following is not a fundamental subatomic particle that forms elements?
nucleus
Which of the following is not a compound?
oxygn
Which of the following does NOT describe uses for the ATP molecule?
pigment structure
Which particle is indicated by the arrow?
proton
A charged particle is generally called an ion or electrolyte.
true
ATP is an unstable, high-energy molecule that provides body cells with a form of energy that is immediately usable.
true
The lower the pH, the higher the hydrogen ion concentration.
true
How many phosphates would ADP have attached to it?
two
