What is an electron shell?
A - A hard container holding electrons close to the nucleus
B - The space around the nucleus where the electrons are most likely to be found
C - The exact location of an electron
D - The electron's protective outer layer
Answer: B - The space around the nucleus where the electrons are most likely to be found
You can never know for certain where the electrons are because they are moving around, so with every snapshot you take of the atom the electrons might be in a different place. Also called electron clouds or energy levels
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Basics Of Chemistry
- Why is it beneficial to use a logarithmic scale to measure pH?
- Which of the following is a strong acid?
- The pH scale is a way of measuring _______.
- The pH scale is a _______ scale.
- Which of the following is a strong base?
- Which of the following is an example of diffusion?
- Which of the following is NOT true?
- What would you expect to happen to a piece of celery you put into a hyper-tonic solution?
- Which of the following is responsible for swelling our hands after exercising?
- What do you think would happen if you added a sugar crystal to a supersaturated solution of sugar in water?
- Which of the following solutes would NOT form a solution if added to water?
- Which of the following is NOT a hydrophobic substance?
- We call a substance that is being dissolved into another substance a
- When a substance dissolves another substance, it is the ______________.
- When one substance is dissolved in another substance, a _____ is formed.
- Why is solid water (ice) less dense than liquid water?
- Which of the following statements accurately describe ice: I. Ice is denser than water. II. Hydrogen bonds hold ice molecules closer together than they do liquid water molecules. III. Ice has a crystalline structure.
- Which of the following concepts help explain why water can travel up a narrow tube? I. Cohesion II. Adhesion III. Specific gravity
- Water's ability to move against gravity in a narrow space, such as a tube, is called
- Which of the following properties explain why a city near the Pacific Ocean experiences less dramatic changes in temperature during the day compared to a city farther inland? I. Water forms hydrogen bonds II. Water has a low specific heat III. Water has a high surface tension
- Which of the following statements is true?
- If Argon is a noble gas and its atomic number is 18, how many electrons can be found in the valence level?
- Given the following information, which element(s) are most likely to lose electrons? I. Iodine is a member of Group VII II. Strontium is located in the second column of the periodic table III. Selenium has six valence electrons
- What is the maximum number of electrons that can occupy the 2s orbital?