Answer:
Elements in a period have wide range of chemical properties.
Explanation:
- Period is the row of chemical elements's arrangement in the periodic table. It is numbered from 1 to 7.
- In period as we move towards right the atomic number of element constantly increases along with the change in chemical properties.
- As we move from left towards right in period, the valence electron number regularly increases in every element.
- This valence electron differs the reactivity of the elements.
Explanation:
Mg-2+C+4>Mg2C.
Here you divide the four by the two and transfer the two toMg. In reactions like this oxidation numbers are exchanged.
The
speed of sound depends on any form of matter or medium in which sound travels
through it and depends on the amount of molecular collisions. Sound travels slowest in gas in the form of steam
because the sound has to move around the gas molecules that are far apart making
it harder for the
energy of vibrations hit the particles and make sound.
Moreover,
sound travelling through solids like ice is much faster because the particles
are closer together so the sound waves do not have to travel that far making the
number of collisions greater and sound spread more easily.
Answer:
12 cm
Explanation:
We shall use Lens makers formula here which is as follows
Put μ = 1.5 , R₁ = 10 cm ,R₂ = - 15 cm ( according to sign convention )
= .5 x ( 15 + 10 ) / 15 x 10
= 
F = 12 cm
IV - paper clip amount
DV - amount it flies
Control - I don't know this one
Constant - the airplane and force used to throw the airplane
