What is a "control" in an experiment? *

Answer:

The factor that the person experimenting has control over

Explanation:

Make a funny sentence for ductile

Here is an example of mercury, It HAS to be for Magnesium.

¨I’m a highly stable element, so you can count on me¨

how do you get from mass to moles in this problem?

What is the equation for torque?

please help me quickly​

the only nonmetal in group 1

how would you describe the size of atoms and molecules in your own words ?

why do you think people believed ________ over ________? Think about the structure of society during that time period

Which statement describes what is happening at the plate boundary in this section of a tectonic map?


Two plates are sliding past each other.


Two continental plates are colliding.


An oceanic plate is subducting.


The seafloor is spreading.

What is the BEST scientific definition of the term “force”?

Please Heeelp!!
Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.)

Note: you are writing the molecular, and not the net ionic equation.


___---> Ca(ClO)2 (aq) + H2O

Why did J.J. Thomson reason that electrons must be a pare of the atoms of all elements?
A) Cathode rays are negatively charged particles
B) Cathode rays can be deflected by magnets
C) An electron is 2000 times lighter than a hydrogen atom
D) Charge-to-mass ratio of electrons was the same, regardless of the gas used

Chemical Formula 1
2H²O²
Number of molecules in chemical formula 1
(A) 1
(A) 2
(C) 3
(D) 4

Chemical Formula 2
4HCI
Number of molecules in chemical formula 2
(A) 2
(B) 4
(C) 6
(D) 8

Chemical Formula 3
3CH⁴
Number of molecules in chemical formula 3
(A) 1
(B) 2
(C) 3
(D) 4

Chemical Formula 4
C⁶H¹²O⁶
Number of molecules in chemical formula 4
(A) 0
(B) 1
(C) 3
(D) 24

Chemical Formula 5
5CaCI
Number of total atoms in chemical formula 5
(A) 5
(B) 7
(C) 11
(D) 15

Chemical Formula 6
NaCI
Number of total atoms in chemical formula 6
(A) 1
(B) 2
(C) 3
(D) 4

Chemical Formula 7
6NH³
Number of total atoms in chemical formula 7
(A) 2
(B) 3
(C) 3
(D) 9

Chemical Formula 8
3H²O
Number of total atoms in chemical formula
(A) 2
(B) 3
(C) 5
(D) 6

Chemical Formula 9
2Fe²O³
Number of total atoms in chemical formula 9
(A) 2
(B) 3
(C) 7
(D) 10

Chemical Formula 10
8CO
Number of total atoms in chemical formula 10
(A) 1
(B) 2
(C) 8
(D) 9
​

48 points
Chemistry is the study of 1.
& its interactions. Matter has
2.___, takes up 3. ____& is made up of 4.____
from the
periodic table. Each element in the periodic table has a different
5. ____structure. You can use the information in the periodic square of
each element to model its basic atomic structure. The three subatomic
particles that make up atoms are the 6. ___charged protons & the
7. ____neutrons are both located in the nucleus, & the 8.____
charged electrons are found orbiting the nucleus. The element's
9. ____number is equal to the number of protons, & identifies the
element. The element's atomic mass is equal to the number of protons
plus neutrons in the 10.____
The atomic charge on atoms in the
periodic table is 11. ____; so the number of electrons in a neutral atom
is also equal to the 12. ____number. Charged atoms are called
13. ____If an atom looses an electron from its neutral state it becomes a
positively charged 14. ____If an atom gains an electron it becomes a
negatively charged 15. ____Atoms with a different number of
neutrons are called 16.___
and they also differ in mass. *