1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhuklara [117]
2 years ago
15

Read the list of elements given below. Be, Mg, Ca, Sr Which of the following about the elements is true? (5 points)

Chemistry
1 answer:
slava [35]2 years ago
4 0

Answer:

Pretty Sure Its A

Explanation:

You might be interested in
BaO2 is a peroxide. Why?
melamori03 [73]

Answer:

jajjsjsjddjdjdjdjdjjdjeieiririitofodoslwnridooskemridisoskswkwjj jwjwiwiwiwkiwiw

7 0
2 years ago
Read 2 more answers
Q1. If a piece of ice absorbs 131 J of heat energy, how much was lost by the surroundings?
Rashid [163]

Answer:

53

Explanation:

4 0
3 years ago
What is the molarity of a solution in which 58g of nacl are dissolved in 1.0 l of solution
Lady_Fox [76]

Hey there :

Molar mass of NaCl = 58.44 g/mol

Number of moles :

n = mass of solute / molar mass

n = 58 / 58.44

n = 0.9924 moles of NaCl

Volume = 1.0 L

Therefore:

Molarity = number of moles / volume ( L )

Molarity = 0.9924 / 1.0

Molarity = 0.9924 M

Hope that helps!

7 0
3 years ago
Which electron transition represents a gain of energy
Helen [10]

Answer:

The transition from lower energy level to higher energy level require a gain of energy.

Explanation:

When transition occur from lower energy level to higher energy level require a gain of energy. Electron could not jump unto higher energy level without gaining thew energy.

When electron jump into lower energy level from high energy level it loses the energy.

For example electron when jumped from 2nd to 3rd shell it gain energy and when in return back to 2nd shell from 3rd shell it loses energy.

The process is called excitation and de-excitation.

Excitation:

When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits.

De-excitation:

When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum.

3 0
3 years ago
At STP how many moles or helium would occupy a volume of 12 liters?
butalik [34]
1 mole ------------- 22.4 L ( at STP )
?? mole ---------- 12 L

12 x 1 / 22.4 => 0.5357 moles

hope this helps! 
5 0
3 years ago
Other questions:
  • How does a lithium cation compare to a lithium atom?
    7·1 answer
  • What do the orange and yellow spheres represent in this model of an atomic nucleus?
    9·1 answer
  • How many grams of hydrogen gas would be needed to form 8.0 grams of water? H2+O2=H2O
    5·1 answer
  • Which of the following types of molecules always has a dipole moment? Linear molecules with two identical bonds. Trigonal pyrami
    5·1 answer
  • A Brønsted-Lowry acid is a substance which produces a. hydroxide ions in aqueous solution. b. accepts protons from other substan
    13·1 answer
  • What phase transitions occur as you uniformly increase the pressure on a gaseous sample of iodine from 0.010 atm at 185 ∘c to 10
    10·1 answer
  • The type of bond formed between two atoms can be predicted on the basis of ___?​
    13·1 answer
  • Two identical sister chromatids are held together at what
    12·1 answer
  • Will a block of material having a volume of 1.97 x 105 cm3 and weighing 1.59 kg float or sink when placed in water? Show calcula
    5·1 answer
  • Why is magma so hot?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!