Answer:
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. The horizontal rows on the periodic table are called periods.
Step-by-step explanation:
Answer: 2(x+1)
Step-by-step explanation: free points right?
Answer: second Congress
Step-by-step explanation:
Short and sweet
Answer:
5
Step-by-step explanation:
Pretty self-explanatory
Answer:
A system of equations can intersect at no points; this is when the lines are parallel, which means they have the same slope and different y-intercept. A system of equations can intersect at one point; this is when the lines have different slopes.
Step-by-step explanation: