Answer:
When a neutral atom gains one or more electrons it becomes negative ion also known as anion
For example
Cl+ e- -------> Cl-
O +2e- -------> O2-
Explanation:
at least two examples
of Chemical Formula
Explanation:
Rotting, withering, heat and light emission, precipitate formation, gas evolution, or a change of appearance.
Answer:
h20 (water duh)
C9H13N (Amphetamine)
C6h1206 (glucose)
When an apple falls from a tree, when does gravity act on the apple?
Which of the following is an example of chemical energy?
a hot metal pan
an apple
turning on the TV
a roller coaster rolling down
HELP PLZ
Answer:
turning the tv
Explanation:
Which of these are examples of polygenic traits? blood type in humans and birth weight in calves birth weight in calves and eye color in humans eye color in humans and blood type in humans flower color in snapdragons and birth weight in calves ASAP
Answer:
birth weight in calves, flower color in snapdragons
Explanation:
That should be correct I think if I remember correctly
How should Point 2 on the Land Breeze diagram be labeled?
a
Cool air, high pressure
b
Cool air, low pressure
c
Warm air, high pressure
d
Warm air, low pressure
can you please help. I don't know how to do it.
The area used to be covered by an ocean
the atomic number of an element is the number of ______ plus the number of _____ found in the element's nucleus.
Answer:
protons and electrons
Explanation:
The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom. To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number.
Please answer all these questions!!
Answer:
The FIRST ONE is
(D. Convection
The SECOND ONE is
(D. Atoms and Molecules are always in motion
Is there a relationship between cohesion and volume?
Help me with this please! Do not say "I don't know" to get my points!!!!!!! It is not helpful and disrespectful. THANKS!
no- and na- nano5
na- and na+ nana2
hope this helps
Explanation:
After learning about chemical reactions, Jack investigated different kinds of chemical changes using substances he found in his kitchen so that he could see these changes. Which of the following will NOT occur when a chemical reaction takes place?
A.New bonds form.
B.Existing bonds break.
C.The same substance will have different properties.
The Brahman cattle have good resistance to high temperature, but its meat is poor and tough to eat. The English shorthorn cattle, on the other hand, have good meat, but poor resistance to high temperatures. Farmers formed the Santa Gertrudis cattle by breeding Brahmans with English shorthorns. This new type of cattle has good meat and resistance to high temperatures. Which of the following best describes the process used to produce the Santa Gertrudis cattle?
A.
genetic engineering
B.
inbreeding
C.
natural selection
D.
selective breeding
Answer:
d
Explanation:
Melvin is exploring the different kinds of changes that can happen to substances. After reading about the kinds of changes that occur, he saw some rust on a pipe that was going into his house. What kind of change is the formation of rust?
A.reactant
B.physical
C.chemical
Answer:
It is B. physical.
Explanation:
The rust on the pipe is something causes by something, which mean it is physical. Hope this helped you out!!
Have a wonderful day! :D
Which of the following 4 elements would be the most stable?
A) Neon
B) Chlorine
C) Hydrogen
D) Fluorine
Answer:
I'm gonna say that c. hydrogen is the answer
Explanation:
bc
I NEED HELP PLEASE! THIS IS HARD FOR ME!!
Answer:
it should be D! hopes this helps
from all the layer the fossil cant disappear so not C and cNf decrease because there are to many layers so not a but it could be B but d seems to make more sense
When an earthquake occurs, two different types of waves are generated. These waves are called P waves and S waves. Examine the diagram, which shows how the waves travel through Earth. Which statement provides the best evidence of Earth’s structure, based on the information in the diagram?
A. The bending of S-waves shows that Earth has both an outer and an inner core.
B. Earthquakes provide no information because they cannot be detected all over Earth.
C. S-waves do not travel through liquids, so the evidence shows that Earth has an outer core layer made of liquid.
D. P-waves do not travel through liquids, so the evidence shows that Earth has an outer core layer made of liquid.
Answer:
Since S-waves do not travel through liquids, the evidence shows that Earth has an outer core layer made of liquid.
PLEASE HELP ME ITS DUE IN 1 HOUR PLZZZ
In a ___________ reaction, an acid and a base produce a salt and a water.
a. Decomposition
b. Neutralization
c. Synthesis
d. Concentrated
Why does the Earth spin faster at the equator than the poles?
a
Due to the temperature differences on Earth, the land/sea near the equator goes at a faster rate. The Earth spins faster there only during the summer months.
b
The Earth is much wider at the equator than at the poles. It must cover a larger distance in the same amount of time (24 hours).
c
Due to the tilt of the Earth on its axis, the equator gets more sunlight -- therefore making it spin faster.
Answer:
Specifically, Earth rotates faster at the Equator than it does at the poles. Earth is wider at the Equator, so to make a rotation in one 24-hour period, equatorial regions race nearly 1,600 kilometers (1,000 miles) per hour. Near the poles, Earth rotates at a sluggish 0.00008 kilometers (0.00005 miles) per hour.
Which of the worlds oceans is mostly made of ice?
Please hurry and God bless and stay safe! :)
Answer:
The Artic Ocean
Explanation:
it is mostly surrounded by land with only a bit of exchange of water with the other oceans
Answer:
The Artic Ocean
Explanation:
coochie man
Explain the “war of the currents”
please help with at least 1 sentence
Answer:
The war of currents was a series of events surrounding the introduction of competing for electric power transmission systems in the late 1880s and early 1890s.
Explanation:
What reaction type is MgCl2 ---> Mg + Cl2 ?
a. Synthesis
b. Single Replacement
c. Double Replacement
d. Decomposition
Answer:
A.Synthesis
Explanation:
What reaction type is MgCl2 ---> Mg + Cl2 ?
a. Synthesis
b. Single Replacement
c. Double Replacement
d. Decomposition
Answer
A. Synthesis.
Why do you think the Na+ ion is smaller than a neutral Na atom? Why do you think the Cl - ion is larger than a neutral Cl atom?
Answer:
Na+ ion is smaller than a neutral Na atom in the ion there was one more proton which will attract electron bring it closer to the center making the atomic radius smaller. Therefore making a Na+ ion is smaller than a neutral Na atom Explanation:
yes
The Dust Bowl was a time In the 1930s when prairie states in the Midwest had farmlands torn apart by wind erosion and storms. This disaster caused food shortages and financial hardship. What practice is most helpful to prevent another similar tragedy?
A. no-till farming to allow roots to hold soil together
B. over watering of fields to keep soil wet
C. terrace farming by putting walls up on hills
D. agricultural reform to change the types of crops planted
Answer:
C
Explanation: The dust bowl killed many crops resulting to low nutrients
Definition: Water that falls to the ground as rain
What would happen if a cell membrane let too much water into a cell?
Answer:
Animal Cell
When water moves into an animal cell (e.g. a red blood cell), the cell membrane stretches and the cell gets bigger. If this continues, the cell membrane will burst – this is called lysis.Plant Cell
When too much water moves out of a plant cell the cell contents shrink. This pulls the cell membrane away from the cell wall. A plasmolyzed cell is unlikely to survive.If you compare a long wavelength with a short wavelength, which one should have a higher frequency? Why?
Answer please 10 points
Answer:
water
Explanation:
Answer:
Water
Explanation:
Most of the Earth is covered with water, so water is the substance.(H20)
Answer please 10 points science queasy
Answer:
B
Look up cumulonimbus clouds it looks like b
____CaSO 4 , ____O2 +____CaS