Answer:
Explanation:
Many elements have similar properties. This can be seen in how periodic table is arranged. The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties.
For eg: Lithium, Sodium, and Potassium fall under group one in periodic table. These elements exhibit similar properties such as being extremely reactive.
Answer:
A mixture is a combination of two or more pure substances that are not chemically combined. Mixtures are held together by physical forces and therefore can be separated physically.
Answer:
190.92 J
Explanation:
By using the formula Q = mcΔT
Q = 1.5g × 4.18 J/g°C × 30.45°C
= 190.92 J
Answer:
Explanation:
<em>0.5 i go to k12 i jus took the test</em>
