benchmark 2 practice

Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a diatomic element?
Back
A diatomic element is a molecule composed of two atoms of the same element, such as O₂ (oxygen) or H₂ (hydrogen).
2.
FLASHCARD QUESTION
Front
What is a compound molecule?
Back
A compound molecule is formed when two or more different elements bond together, such as H₂O (water) or CO₂ (carbon dioxide).
3.
FLASHCARD QUESTION
Front
What does the periodic table represent?
Back
The periodic table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties.
4.
FLASHCARD QUESTION
Front
What is atomic size?
Back
Atomic size refers to the distance from the nucleus of an atom to the outermost shell of electrons, which varies among different elements.
5.
FLASHCARD QUESTION
Front
How does atomic size change in the periodic table?
Back
Atomic size generally increases down a group due to the addition of electron shells and decreases across a period from left to right due to increased nuclear charge.
6.
FLASHCARD QUESTION
Front
What are valence electrons?
Back
Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.
7.
FLASHCARD QUESTION
Front
What is the significance of the group number in the periodic table?
Back
The group number indicates the number of valence electrons in the elements of that group, which influences their chemical properties.
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