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JulsSmile [24]
3 years ago
12

How to read a periodic table

Chemistry
2 answers:
Korvikt [17]3 years ago
8 0
Read it from
Right to left
igor_vitrenko [27]3 years ago
7 0

Recognizing the Structure of the Periodic Table. Read the periodic table from top left to bottom right. The elements are ordered by their atomic numbers, which increase as you move across and down the periodic table. The atomic number is how many protons the element's atom possesses.

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True or false? minerals are identified on the basis of their physical properties
alukav5142 [94]
The answer to this is true
4 0
3 years ago
Read 2 more answers
A box has the weight of 120N and the bottom of the box is 12 cm² what is the pressure the box exerts on the floor
Molodets [167]

100000N/m²

Explanation:

Given parameters:

Weight of the box = 120N

Area of the box = 12cm²

Unknown:

Pressure of the box on the floor = ?

Solution:

Pressure is the force exerted by a body per unit area:

            Pressure = \frac{force }{area}

We need to convert the area into m² from cm²

     10000cm²  = 1m²

      12cm²  =     \frac{12}{10000} = 0.0012m²

 Pressure = \frac{120}{0.0012} = 100000N/m²

Learn more:

Pressure brainly.com/question/4868239

#learnwithBrainly

4 0
3 years ago
How many electrons in an atom can have each of the following quantum number or sublevel designations?
Karo-lina-s [1.5K]

Answer: (a) 2 (b) 6 (c) 14

Explanation:

In the Azimuthal quantum number(l) electrons in a particular subshell (such as s, p, d, or f) are defined by values of l (0, 1, 2, or 3).

s is l=0, p is l=1, d is l=2, f is l=3.

The magnetic quantum number (ml)  The value of ml can range from -l to +l, including zero. Thus the s, p, d, and f subshells contain 1, 3, 5, and 7 orbitals each, with values of m within the ranges 0, ±1, ±2, ±3 respectively. Each shell can have 2 x l + 1 sublevels, and each of these sublevel can accommodate up to two electrons.

(a) n=2, l=1, ml=0. If l=1 then 2 x 1+ 1=3 sublevels, 3*2=6 electrons. When l=1, ml =-1,0,+1, ml=0  accommodate two(2)electrons

(b) 5p. p is l=1  If l=1 then 2 x 1+ 1=3 sublevels, 3*2= electrons. This means in the 5 shell, the p orbital has 3 subshell and accommodate 6 electrons.

(c) n = 4, l = 3 if l=3 then 2 x 3+ 1=7 sublevel 7*2=14 electrons. This means the in the 4 shell, the f orbital has 7 subshell and accomdate 14 elections.

7 0
3 years ago
1. The atomic number of an element is 23 and its mass number is 56. a. How many protons and electrons does an atom of this eleme
Arte-miy333 [17]

Answer:

There are 23 protons and 23 electrons. We know this because atomic number denotes the number of protons and also electrons. There are 56 - 23 = 33 neutrons because atomic mass denotes the total number of protons and neutrons.

7 0
4 years ago
Select all that apply. Using your periodic table of the elements which chemical symbols indicate an element?
tatuchka [14]

Answer:

O, I, Ca

Explanation:

4 0
3 years ago
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