Elements With Atomic Number Above 95 Are Called ' ' Elements (2023)

Chemistry High School


Answer 1

Transuranium Element.

Related Questions

The part of a cell that gives the cell unique characteristics is the


Chromosomes....UNIT OF GENES

An atom of which of these elements most likely forms an anion? a. AI
b. Br
c. Ca
d. Mg



Which element forms an ionic compound when it reacts with magnesium?


Chlorine and Magnesium form MgCl2

Determine the mass of oxygen in a 7.20 g sample of Al2(SO4)3.



7.20 g sample of Al2(SO4)3


Mass of oxygen


Since you are not given a chemical reaction, just base your solution to the chemical formula given.

Molar mass of Al2(SO4)3 = 342.15 g/mol

7.20 g Al2(SO4)3 (1 mol/342.15g)(3mol O/2 mol Al)(1 mol O2/1/2 mol O2)(32g O2/1mol O2) = 4.04 g O2

7.20 g of a sample of Al2(SO4)3 contains 4.04 g of oxygen.

Further ExplanationA compound

  • A compound is a substances that contains two or more different atoms that are bonded together. When the atoms are similar the substance is known as a molecule, therefore not all molecules are compounds.

Molar mass

  • Molar mass is the mass of one mole of a compound or a substance. The molar mass of a compound is the mass that is equivalent to the sum of relative atomic masses of the atoms of elements making up the compound.

Mass percent composition of a compound

  • Mass percent composition of a compound is calculated by dividing the mass of element in one mole of the compound by the molar mass of the compound and multiplying by 100%.

In this case we are require to calculate the mass of Oxygen in 7.2 g of Al2(SO4)3

  • Therefore; the molar mass of Al2(SO4)3 will be; 342.15 g/mol
  • Al2(SO4)3 is made up of two Al atoms, three sulfur atoms, and 12 oxygen atoms.


1 mole of Al2(SO4)3 contains a mass of 192 g of Oxygen

Thus; A sample of 7.20 g Al2(SO4)3 will contain;

= ((7.2 g Al2(SO4)3x(192 g O))/ 342.15 g/mol Al2(SO4)3

= 4.04 g Oxygen

Keywords: Molar mass, compound

Learn more about:

  • Compounds: brainly.com/question/1194814
  • Atoms: brainly.com/question/12505687
  • Percentage composition by mass in compounds: brainly.com/question/9118852

Level: High school

Subject: Chemistry

Topic: Compounds and mixtures

Sub-topic: Composition of compounds

Determine the volume in liters occupied by 14g of nitrogen gas STP


Molar mass N₂ = 28.0 g/mol

Number of moles:

n = mass / molar mass

n = 14 / 28.0

n = 0.5 moles

1 mole N₂ -------- 22,4 ( at STP)
0.5 mole N₂ ------- ?? Liters

L =22.4 * 0.5 = 11,2 L

hope this helps!

Which chemical species can easily form an ionic bond with a cation?


Anions - Anions are non-metals who tend to gain electrons in their valence shell, resulting in a negative charge.

2h2o》2h2+o2 what type of chemical reaction does this equation represent



is the reaction of water decomposition

hope this helps!

How many grams of N2 are required to produce 100.0 L of NH3 at STP?



N2, volume of 1L of NH3 at STP


Grams of N2


N2 + 3H2 -> 2NH3

Molar mass of N2 = 28g

From the ideal gas equation PV = nRT

n = PV/RT

n = (1 atm)(100 L)/(0.08206 L-atm/mol-K)(273K)

n = 4.46 mol of NH3

from the reaction, we need 2 moles of NH3 to get 1 mole of N2

4.46 mol NH3(1 mol N2/2 mol NH3) = 2.23 moles N2

2.23 moles of N2(28 g N2/1 mol N2) = 62.5g N2

Answer:it’s c


How far away is Neptune from the sun.


It is 2.795 billion miles or 4.498 billion kilometers from the Sun

2.795 billion mi away the sun

What is the difference between ozone and oxygen?


The only difference is the ozone is made up of three atoms of oxygen

Oxygen is diatomic. ozone is triatomic.
oxygen is gotten from decomposition of hydrogen peroxide. ozone is from electric sparks in the atmosphere.
ozone is a bleaching agent. oxygen is not.
ozone is pale blue with choking smell. oxygen is colorless and odorless.

Carbon dioxide, Methane, Chlorofluorocarbons and Nitrous Oxide represent the group: Options
Ozone Depleting Substance
Green House Gases
Suspended Particulate Matter
None of the above


All of these compounds listed are Green House Gases

When bonded with four hydrogen atoms, carbon has which shape? A. bent
B. linear
C. tetrahedral
D. hexagonal
User: Graphite is able to conduct electricity due to
A. ionic bonds.
B. metallic bonds.
C. delocalized electrons.
D. its rigid structure and density.


When carbon bonds with 4 hydrogen atoms which is methane having sp3 structure so it is tetrahedral. electricity is conducted by electrons so graphite conducts by free and delocalised sea of electrons.


When carbon bonds with 4 hydrogen atoms which is methane having sp3 structure so it is tetrahedral. electricity is conducted by electrons so graphite conducts by free and delocalised sea of electrons.

Which scientist offered proof that atoms exist? a. Aristotle
b. Democritus
c. John Dalton
d. Isaac Newton


Answer: b. Democritus


The greek philospher Democritus around 400 B.C proposed first atomic theory. He proposed the fact that the world is made of two things such as void (empty space) and the tiny particles called as atoms. He said that the atoms are indestructible, small and invisible. These atoms cannot be broken as they are the smallest particles. The atoms combine to form molecules, ions, rocks and other entities.

Democritus created the atomic theory but John Dalton created the modern and improved atomic theory, so I'd go with C.

If the absolute temperature of a gas is 600 K, the temperature in degrees Celsius is A. 273°C.
B. 705°C.
C. 327°C.
D. 873°C.


K = C + 273
600 = C + 273
C = 600 - 273
C = 327C

How To Calculate The Structure Ofan Element?


To calculate for the structure of an element, you need to have a solid analyzer such as an x ray diffractometer to determine the elements’ structure. It is hard to determine it without any help of instrument because of its size.

Periods on the periodic table are arranged A. in horizontal rows.
B. by order of density.
C. in vertical columns.
D. in no particular order.


The correct answer is A. In horizontal rows


In the periodic table, the term "periods" refers to the horizontal rows; this is the opposite of "groups" that refer to the columns or vertical sections in the periodic table. In total there are seven different rows, and each row contains elements of different groups. Moreover, in each row, the elements are organized according to the atomic number (number of protons) and each row refers to a specific electron shell configuration (energy level). For example, in the fourth row, the first element is Potassium (K) and the atomic number of this is 19, while the last element of this period or row is Krypton (Kr) and the atomic number of this is 36. Also, all the elements in this row have the same number of electrons or electron configuration. According to this, the periods are arranged in horizontal rows.


Without the atmosphere, the nitrogen, water, and carbon-oxygen cycles would not work. a. True
b. False


I belive that it has to be (a) as without an atmoshpere these gases would escape into space.
Hope this helps :).

Without the atmosphere, the nitrogen, water, and carbon-oxygen cycles would not work.

(Answer) TRUE!

What is an unsaturated hydrocarbon with a ring structure known as? Aromatic


It's an aromatic compound as aromatic compunds have a ring structure and are also unsaturated the others Alkyne, Alkene and Alkane have no ring structure and Alkynes and Alkenes are unsaturated whre Alhanes are saturated.
Hope this helps :).



An Aromatic is an unsaturated hydrocarbon with a ring structure holding a sigma bond between carbon atoms.

Three ways plants adapt to their environment


Three ways plants adapt to their environment

1. Tundra. They have the ability to grow under a layer of snow to carry out photosynthesis.

2. Desert. Adapted to the extreme heat and aridity and are called xerophytes.

3. Rainforest. Their roots in the ground and grow higher to reach sunlight.

When a bond forms between two atoms A. protons are lost.
B. neutrons are lost.
C. energy is released.
D. energy is absorbed.


Answer: The correct answer is Option C.


A bond is formed of when two atoms come close to each other either by sharing electrons or by transferring of electrons from one atom to another.

In the process of bond formation, energy is released.

A bond is broken between two atoms when the atoms get away from each other. In the process of bond breaking, energy is required.

Hence, the correct answer is Option C.

C. energy is released
(Forming bond is exothermic)

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