Answer:Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest. So the asnwer is helium
Explanation:
URGENT!...
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Why are there more earthquakes in California than Tennessee?
A. There is more plate movement in Tennessee.
B. California is breaking off to fall into the ocean.
C. There is more plate movement in California.
Answer: C. There is more plate movement in California.
Explanation:
the left-right inversion one word answer
Answer:
Lateral Inversion
Explanation:
According to the picture above, which layer contains :
Answer:
a) layer 4
b) layer 1
Explanation:
Older the layer=older the fossils
Newer the layer=newer the fossilss
Which of the following of elements would have all four valence electrons
B, Si, As, Te
C, Si, Ge,Sn
O, S, Se, Te
Ga, Ge, As, Se
Answer:
D
they are used for manufacturing Of diodes
Answer:
is the answer D
Explanation:
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Where is there higher air pressure, above the land or above the water?
Answer:
The air above land also warms faster than air above the sea. Cooler higher pressure air above the ocean moves toward warmer lower pressue air above land.
Answer:
Use the sources to help you, but I would say above the water.
Explanation:
"However, water heats up much more slowly than land and so the air above the land will be warmer compared to the air over the ocean. The warm air over the land will rise throughout the day, causing low pressure at the surface. Over the water, high surface pressure will form because of the colder air."
AND
"The depth (distance from top to bottom) of the atmosphere is greatest at sea level and decreases at higher altitudes. With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude."
I hope this helps you!
PLease help I need to get this test done and whoever helps first I will mark brainliest Love you!!!!!
Answer:
moon
Explanation:
Answer:
Explanation:
its the moon. the moon covers the sun causing it to be completely blakened out. and if thats not right then lifes a lie cuz i got blinded pretty bad in one of my eyes for looking at it with it
THIS is SO easy PLEASE help ME ! ill ALSO mark YOU brainliest !
Compare the elements: Sn, Sb, Te, and I:
Which has the lowest ionization energy?
Why?
Answer:
Sn
Explanation:
Tin, Sn, will have the lowest ionization energy from the given choices.
Sn is an element is the fourth group on the periodic table.
Ionization energy is a measure of the readiness of an atom to lose an electron. The lower the value, the easier it is for an atom to want to lose an electron and vice versa.
Across a period, I.E increases progressively from left to right due to the decreasing atomic radii caused by the increasing nuclear charge which is not compensated for by successive electronic shells.
Sn, Sb, Te and I are all in the 5th period.
Which is Chemical Equation is Balanced?
CH, +0,------CO,+2H2O
4A1+30,-----2A1,0,
H2+O2-----2H,0
POSS
Explain when gold is considered an element and when it is considered a solution.
Answer:
Gold is an element even when it is in a solution
It has been windy in Wren’s town. Wren wants to know how fast the wind is moving. Which tools could he use?
Answer:
We can use a fan, divide the number of times that fan spins by the time it takes and the speed is obtained
How many miles of sodium chloride are produced when 2.9 grams of sodium iodide reacts? __ mol NaCl
2 Nal(s) + Cl2(g) = 2 NaCl(s) + l2(g)
**Report your answer to the correct number of significant digits!
Answer: I am trying 0.88 if it is correct then I will edit this to say that!
Explanation:
HELP AND ILL PUT U ON BRAINLIEST ! -THANKS
Answer:
2Fe₂O₃
Explanation:
If the number of atoms of each element are the same on reactant and product sides, it is a balanced equation. This is not a balanced equation because the number of atoms of each element are not the same on reactant and product sides.
To balance an equation, let's first list the atoms:
FeOThen, we count the number of atoms on both sides:
1 Fe 22 O 3We multiply the number of atoms for each element on either side by the number of molecules (aka coefficient, or "big number"):
4 Fe 26 O 3To balance the equation, we need the total number for Fe on the right side to be 4, and the total number for O on the right side to be 6. We can do that by adding a "big number", or coefficient in front, which when multiplied by the number of atoms for each element, makes a balanced equation.
2 is a good value: 2 × 2 = 4, and 2 × 3 = 6.
As such:
4Fe + 3O₂ → 2Fe₂O₃
Which of the following would you get from playing too much tennis?
A. Cerebral Palsy
B. Muscular Dystrophy
C. Tendonitis
D. ALS
Answer:
cerebral palsy
Explanation:
3. What is physical science mainly about? *
the relationship between matter and energy
O the relationship between matter and light
the relationship between molecules and matter
O the relationship between light and energy
PLZ HELP!!
Answer: D
Explanation: Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.
What is the frequency of a photon whose energy is 5.4 ´ 10-19 J? (h = 6.626 ´ 10-34 J·s)
Answer:
8.15 x 10¹⁴Hz
Explanation:
Given parameters:
Energy of photon = 5.4 x 10⁻¹⁹J
h = 6.626 x 10⁻³⁴J.s
Unknown:
Frequency of the photon = ?
Solution:
The energy of a photon is given as;
E = hf
h is the Planck's constant
f is the frequency
f = [tex]\frac{E}{h}[/tex] = [tex]\frac{5.4 x 10^{-19} }{6.626 x 10^{-34} }[/tex] = 8.15 x 10¹⁴Hz
How many electrons surround the
nucleus of an atom of Thallium?
Answer:
81
Explanation:
Lead (11) oxide dissolves in both
excess dilute nitric acid and
sodium hydroxide solution -
Which of the following is the
property of lead (11) oxide.
A Basic
B Acidic
C Neutral
D Amphoteric
Answer:
bacic
Explanation:
it is very soluble in water