Groups
Same number of valence electrons
Li, Na, K
Explanation:
A.
If the periodic table is not color coded, the groups of elements gives the arrangement of atoms with the same chemical properties.
All elements that are in the same group have the same chemical properties.
Periodic table groups are also called family. They are the vertical columns on the periodic table.
B.
Elements that same number of electrons in outermost shell have the same chemical properties.
The outermost shell is called the valence shell of an atom.
They are the shell containing the most loosely held electrons. Group 1 has just one electron in their outermost shell.
C.
Li Na k group 1
F Cl Br group 7
learn more:
Periodic table brainly.com/question/2014634
Groups brainly.com/question/2690837
#learnwithBrainly
Diceplacement is the distance an object has traveled in a certain direction
for example, if you were to walk North for 20m, then east for 40m, the <u>distance</u> you have traveled is 60m however your displacement is the distance between your starting position and your end position;
sqrt(20^2+40^2) = 44.7m
and because displacement is a vector, there needs to be a direction;
sin(theta)=40/44.7
theta=63.4 degrees East of North
therefore the true displacement is 44.7m at 63.4 degrees East of North
When standing behind the sound source
