This task can be easily done once we have the periodic table. From the periodic table, it can be seen that potassium is in the fourth row. Thus, it has four energy levels. If we are to use the same principle as that stated above, the number of energy levels for each are as follow:
Calcium = Ca (in periodic table) = energy levels
Iron = Fe (in periodic table) ; 4 energy levels
Nickel = Ni (in periodic table); 4 energy levels
Zinc = Zn (in periodic table) = 4 energy levels
It means that a person has the ability to describe, explain, and predict natural phenomena. Scientific literacy entails being able to read with understanding articles about science in the popular press and to engage in social conversation about the validity of the conclusions. Scientific literacy implies that a person can identify scientific issues underlying national and local decisions and express positions that are scientifically and technologically informed. A literate citizen should be able to evaluate the quality of scientific information on the basis of its source and the methods used to generate it. Scientific literacy also implies the capacity to pose and evaluate arguments based on evidence and to apply conclusions from such arguments appropriately.
hope this helps and sorry if this is wrong
Answer:
The chemical properties are then number 2 and 4:
- It reacts with metals to form metal hydroxide and hydrogen gas.
- It decomposes to form hydrogen and oxygen.
Justification:
The chemical properties can only be observed when the substance undergoes a chemical change, which is that the substance is transformed into one or more different substances. As result of a chemical change, the composition of the former substance changes, braking some chemcial bonds and formng new ones.
The number 1 states that the water reacts with metals to form metal hydroxide, meaning that the water is transformed into a new substance, the composition will not be H₂O andy more, since the atoms will be combined with atoms of different elements. Same, can be told about the number 2, which states that hydrogen and oxygen were obtained when water decomposed.
On the other hand, the thermal conductivity of water and the boiling point (the temperature at which the water evaporates) can be measured without changing the composition of the water, so those are physical properties.
Answer:
D. [NO₂]²/[N₂O₄]
Explanation:
The equilibrium constant expression for a reaction is products over reactants. Since NO₂ has a coefficient of 2, it will become an exponent.
So, it would be:
[NO₂]²/[N₂O₄]
Hope that helps.
