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
aleksandr82 [10.1K]
3 years ago
8

An atom has atomic number 20, in which group and in what period is this atom located?

Chemistry
1 answer:
Aleksandr [31]3 years ago
3 0

Element: Calcium

Group: 2A/IIA(alkaline earth metals)

Period: 4

You might be interested in
A volume measured by a graduated cylinder that was marked in 100 mL
Natali [406]

The volume measured using such a cylinder will be reported to the nearest 10th mL.

<h3>Cylinder graduation</h3>

10 mL graduated cylinders are always read to the nearest two decimal places.

100 mL graduated cylinders are always read to the nearest 1 decimal place. The nearest 1 decimal place is the same thing as the nearest 10th.

Thus, a reading made using a 100mL increment graduated cylinder would be reported to the nearest 10th mL.

More on cylinder graduation can be found here: brainly.com/question/14427988

#SPJ1

8 0
2 years ago
How many grams of ammonium chloride (gram formula mass= 53.5 g) are contained in .500 L of a 2.00 M solution?
Elza [17]

Answer:

53.5g of NH4Cl

Explanation:

First, we need to obtain the number of mole of NH4Cl. This is illustrated below:

Volume = 0.5L

Molarity = 2M

Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 2 x 0.5

Mole = 1mole

Now, let us convert 1mole of NH4Cl to gram. This is illustrated below:

Molar Mass of NH4Cl = 53.5g/mol

Number of mole = 1

Mass =?

Number of mole = Mass /Molar Mass

Mass = number of mole x molar Mass

Mass = 1 x 53.5

Mass = 53.5g

Therefore, 53.5g of NH4Cl is contained in the solution.

8 0
3 years ago
There is nothing that you can do to conserve energy. True or False
Firdavs [7]
I am going to say it is false.
6 0
3 years ago
Read 2 more answers
Compare and contrast how wind glaciers abrade rock?
pochemuha
Wind abrades rock by sandblasting, this is the process in which wind causes the
3 0
3 years ago
Drag the tiles to the correct locations on the equation. Not all tiles will be used.
mel-nik [20]

Answer:

Tile 52 and three are incorrect

Explanation:

6 0
2 years ago
Other questions:
  • What does criteria mean???​
    10·2 answers
  • If the half-reaction: Fe3+ + e- = Fe2+ were chosen as the standard reduction potential table reference instead of: 2H+ + 2e- = H
    10·1 answer
  • What is atomic mass of an element stands for
    12·1 answer
  • What type of reaction happens when you boil water or another liquid?
    8·2 answers
  • Which of the following mass units is the largest? a) 1 cg b) 1 dg c) 1 mg d) 1 ng
    15·2 answers
  • Please help with this chemistry problem! thank you
    6·1 answer
  • Terrence measures the amount of water displaced by various objects when they are dropped into a graduated cylinder of water. By
    13·1 answer
  • What is the number of atoms of oxygen in 0.1 mol of CuSO4.5H2O? &amp; explain​
    14·1 answer
  • A compound contains 25.94%N and 74.06% O by mass whats the empirical formula
    13·1 answer
  • When carbon dioxide dissolves in water, it undergoes a multistep equilibrium process, with Koverall = 4.5x10⁻⁷, which is simplif
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!