1st Semester Final Practice
Flashcard
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Avogadro's number?
Back
Avogadro's number is 6.02 x 10^23, which represents the number of atoms, molecules, or formula units in one mole of a substance.
2.
FLASHCARD QUESTION
Front
What are alkaline earth metals?
Back
Alkaline earth metals are the elements in group 2 of the periodic table, which include beryllium, magnesium, calcium, strontium, barium, and radium.
3.
FLASHCARD QUESTION
Front
Which element has the largest atomic radius?
Back
Francium has the largest atomic radius among the alkali metals.
4.
FLASHCARD QUESTION
Front
What happens to atomic size as you move across a period in the periodic table?
Back
As you move across a period, atomic size decreases due to the increase in nuclear charge, which pulls electrons closer to the nucleus.
5.
FLASHCARD QUESTION
Front
How many protons are in a titanium atom?
Back
A titanium atom has 22 protons.
6.
FLASHCARD QUESTION
Front
What is the significance of protons in an atom?
Back
Protons determine the atomic number of an element and its identity.
7.
FLASHCARD QUESTION
Front
What is the difference between atoms and molecules?
Back
Atoms are the basic units of matter, while molecules are formed when two or more atoms bond together.
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