A radioactive element is subject to spontaneous degeneration of its nucleus. All elements with atomic numbers greater than 83 are radioactive. Examples are radium, thorium, and uranium.
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All the choices in the question are sources of error i.e.
- People observe things slightly differently and can make mistakes
- Measuring devices have limits, might be broken, or might be calibrated incorrectly
- Outside factors can affect the experiment (temperature, humidity, light, wind, etc.
- Experiments are usually not 100% accurate. This means that an experiment is most of the time, with error. Errors usually occur in measurement or observation and can cause them to be different from the true values of what is being measured.
TYPES OF ERROR:
Error can either be systematic or random.
- Random errors are errors causes by unpredictable circumstances in the experiment
- Systematic errors are caused by faulty or inaccurate instruments used.
According to this question, the following can be sources of errors in an experiment:
- People observe things slightly differently and can make mistakes
- Measuring devices have limits, might be broken, or might be calibrated incorrectly
- Outside factors can affect the experiment (temperature, humidity, light, wind, etc.
Learn more: brainly.com/question/14149934
Answer:
c = 0.07 j/g.k
Explanation:
Given data:
Mass of sample = 35 g
Heat absorbed = 48 j
Initial temperature = 293 K
Final temperature = 313 K
Specific heat of substance = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = Final temperature - initial temperature
ΔT = 313 k - 293 K
ΔT = 20 k
Now we will put the values in formula.
48 j = 35 g × c× 20 k
48 j = 700 g.k ×c
c = 48 j/700 g.k
c = 0.07 j/g.k
In a chemical equation, the reactants are written on the left, and the products are written on the right.The coefficients next to the symbols of entities indicate the number of moles of a substance produced or used in the chemical reaction.The reactants and products are separated by an arrow, usually read aloud as "yields."Chemical equations should contain information about the state properties of products and reactants, whether aqueous (dissolved in water) solid (s), liquid (l), or gas (g).
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Answer:
neutron, and the way I remember that is because NEUTron is NEUTral
Explanation:
proton are positive (both start with a 'p') and electrons are negative