The scientific method is a series of sequential steps used to build scientific knowledge. In the scientific method, the collection of data is a previous step before making conclusions from these data.
- The statement 'Collecting research data is the final step in the scientific method' is FALSE.
The steps of the scientific method include:
- to make one particular observation of some aspect of the natural world in order to formulate one question from such observation
- to propose a possible explanation (hypothesis) in order to explain this question
- to test the hypothesis by collecting experimental and/or observational data
- to examine the collected data in order to accept or reject the working hypothesis
- to make a conclusion from the results
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This apparent contradiction between the chlorine ion and the sodium ion is; due to electrostatic attraction between the nucleus and the electrons.
As we know, there's a periodic trend for atomic radii in the periodic table; the trend is as follows;
- <em>Atomic radius increases down a group and reduces across the period.</em>
Elements get larger down the group and this explains the trend down a group.
- However, atomic radius decreases across a period because the more Valence electrons there are in an element, the more the electrostatic attraction between the positively charged nucleus and the negatively charged electrons.
Consequently, when Chlorine forms an ion by gaining an electron, the electrostatic attraction between its nucleus and electrons increases and the the atomic radius decreases.
On the other hand, when sodium forms an ion by losing an electron, the electrostatic attraction between its nucleus and electrons decreases and the the atomic radius increases.
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Answer:
The speed of the wave at the given wavelength and frequency is 60 m/s.
The given parameters;
wavelength of the wave, λ = 0.5 m
frequency of the wave, f = 120 Hz
The speed of the wave is calculated by applying general wave equation as shown below;
v = fλ
where;
v is the speed of the wave
v = 120 x 0.5
v = 60 m/s
Thus, the speed of the wave at the given wavelength and frequency is 60 m/s.
Answer:
C
Explanation:
The two z angles form a 90° angle so one z angle would be 45°
