B. The greenhouse effect
C. Solar radiation
D. Air conditioning
a museum display
an ecosystem
an animal
distances across Earth's surface
Answer:
C I took this test yesterday
Explanation:
B. potassium
C. hydrogen
D. lithium
Answer: C. hydrogen
Explanation:
Atomic radius of an atom is defined as the total distance from the nucleus to the outermost orbital of electron.
On moving from top to bottom, there is an addition of shell around the nucleus and the outermost orbital gets far away from the nucleus and hence, the distance between the nucleus and outermost orbital increases.
This in turn increases the atomic radii of the element from moving top to bottom in a group.
B)the smallest unit of p4
C)the smallest unit of NH3
D)the smallest unit of H2O
Scientists conduct investigations based on systematic observations, research questions, and the development of testable hypotheses.
They design experiments, collect data, and analyze it using statistical methods. Peer review and replication are important for ensuring the validity of findings.
Scientists collaborate, communicate their results, and develop theories to explain natural phenomena. The scientific method and critical thinking are central to their work.
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