Answer:
true
covalent bonds are between non metals and nonmetals. and they are sharing electrons.
Answer:
mass of the gram after 28 days = 1.29 grams
Explanation:
From the diagram attached below; we would see the plot of the mass vs the time (days).
However ; to predict what would be the mass of the crystal after 28 days if the growth is linear; we have the following analysis;
Let the mass be Y ( since it falls on the y-axis) and the time (days) be X (since it falls on the x-axis)
So; we can have a table as shown below:
X Y XY XX
0 0.500 0 0
7 0.648 4.536 49
14 0.899 12.586 196
21 1.081 22.701 441
Total :42 3.128 39.823 686
If the growth is linear ; the linear regression equation can be represented as :
y = a+ bx
where ;
and
n = samples given = 4
x = number of days = 28
so;
from the table ; replacing the corresponding values; we have:
a = 0.4829
b = 0.0289
Recall:
y = a+ bx
y = 0.4829 + 0.0289 (28)
y = 0.4829 + 0.8092
y = 1.2921 grams
y ≅ 1.29 grams
mass of the gram after 28 days = 1.29 grams
Absorbed? just guessing but if not reflected?
You use the element symbol and draw the valence electrons. The valence electrons is the number of electrons on the outer shell. An easy way to know how many valence electrons there are, you can look at a periodic table and see what group the element is in. Group 1 has 1 valance electron. Group 2 has 2 valence electrons, and so on... so in the example you gave me, since there is 3 fluorines, and 1 boron, you want to arrange the 3 fluorines around the 1 boron so the electrons can bond with each other.