I NEED ASAP PLEASE!!

Answer:

False, isotopes have different occurrence percentages, so the changes are different.

Explanation:

Hello,

In this case, since it is false that the isotopes of all the elements can be found with the same chance (occurrence) we can consider the following facts:

1. Carbon atom has two major occurring isotopes: C-12 (98.93%) and C-13 (1.07%).

2. Bromine atom has two major occurring isotopes: Br-79 (50.69%) and Br-81 (49.31%).

3. Calcium has four major occurring isotopes: Ca-40 (96.941%), Ca-42 (0.647%), Ca-43 (0.135%) and Ca-44 (2.086%).

Which show us that the chances of finding any isotope differ among elements.

Regards.

The statement presented in the question above is false, as the percentage of occurrence of an isotope cannot be defined and adopted for all elements, as this varies.

We can arrive at this answer because:

An example of this can be seen in Calcium (Ca) isotopes, where the Ca-40 isotope has an occurrence percentage equal to 96.9%, while the Ca-42 isotope has an occurrence percentage equal to 0.64%.

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Answer:

Ok

Explanation:

Answer:

Your answer would be B. Have a wonderful day!

Explanation:

Answer:

Answer is B

Explanation:

Answer:

4.48 L

Explanation:

P1/V1 = P2/V2

453/6.25 = 325/ x

453x = 6.25*325

x = (6.25*325)/453

x = 4.48 L

Answer:

is that in a molecule of an element, all the atoms are the same. For example, in a molecule of water (a compound), there is one oxygen atom and two hydrogen atoms. But in a molecule of oxygen (an element), both of the atoms are oxygen.

Explanation:

Answer:

The only difference between a molecule of a compound and a molecule of an element is that in a molecule of an element all the atoms are the same.

Explanation:  A molecule of an element all the atoms are the same.

Answer:

3NaOH (aq) + Fe(NO₃)₃ (aq) → Fe(OH)₃ (s) + 3NaNO₃ (aq)

Explanation:

Step 1: RxN

NaOH (aq) + Fe(NO₃)₃ (aq) → Fe(OH)₃ (s) + NaNO₃ (aq)

Step 2: Balance RxN

We need 3 OH's on both sides.

We also need 3 NO₃'s on both side.

3NaOH (aq) + Fe(NO₃)₃ (aq) → Fe(OH)₃ (s) + 3NaNO₃ (aq)

Answer:

The answer will be listed below.

Explanation:

Speed and velocity both represent a way to measure the change in position of an object relative to time. If the motion is in a straight lne, then the speed and velocity would be the same. When measuring speed and velocity, they are used in m/s.

Answer:

A

Explanation:

Mass is a measure of the amount of matter in an object.

The mass of a substance measures the amount of matter it contains. Therefore, option A is correct.

Mass can be explained as an intrinsic property of an object. Mass can be described the amount of matter in a body. Different atoms or different particles with the same amount of matter possess nonetheless different masses.

Mass can be experimentally determined by the body's inertia, meaning the resistance to an acceleration of the body when a net force is applied. The mass evaluates the strength of the gravitational attraction to the bodies.

The S.I. base unit of measurement of mass can be represented by the kilogram (kg) but it is not the same as that of weight. Mass can be defined as generally measuring the weight utilizing a spring scale, rather than a balance scale and comparing it to already known masses.

A body on the Moon will weigh less than on Earth due to the lower gravity on the moon but still have equal mass. Paul and Karen determined that the mass of a sample was 50 g which is the amount of matter it contains.

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Answer:

Mass of 0.5 moles CO2 is 22 and Mass of 5 moles of H2O is 90

Explanation:

Moles = [tex]\frac{GivenMass}{Molecular Mass}[/tex]

so value of moles is given 0.5 for co2 and 5 for h2o and the molecular mass of co2 is 44 and h2o is 18 so we put these values in

Mass = Moles x Molecular Mass

and we get the answer

Answer:

gravitational force.

Answer:

sound waves, light waves, radio waves, microwaves and others

Explanation:

these waves have the same fundamental properties of reflection ,refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude

Answer:

+1

Explanation:

Answer:

Step-by-step explanation:

I hope this helps!

Answer:

Explanation:

Step 1: RxN

Ba(NO₃)₂ (aq) + H₃PO₄ (aq) → Ba₃(PO₄)₂ (s) + HNO₃ (aq)

Step 2: Balance RxN

We need 3 Ba's on both sides.

We need 2 PO₄'s on both sides.

3Ba(NO₃)₂ (aq) + 2H₃PO₄ (aq) → Ba₃(PO₄)₂ (s) + 6HNO₃ (aq)

Answer:

For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.

Explanation:

Answer:

valence electrons

Explanation:

The electrons of an atom, in particular valence electrons, are involved in chemical bonding

Answer: atomic mass

Explanation: Mass is equal to one twelfth the mass of an atom of carbon-12

Answer:

mass is one

Explanation:

Answer:

mass and volume are the correct answers

answer: heat needed=18,300

expanation

Basic oxides ⇒ metal(usually alkali/alkaline earth) +O₂

L + O₂ ⇒ L₂O

L + O₂ ⇒ LO

Dissolve in water becomes = basic solution

L₂O+H₂O⇒ 2LOH

LO + H₂O⇒ L(OH)₂

So the basic oxides : Na₂O and MgO

Na₂O + H₂O⇒NaOH

MgO +H₂O⇒Mg(OH)₂

The aqueous solution of CO₂(dissolve in water)

CO₂ + +H₂O⇒ H₂CO₃(carbonic acid)

Answer:

Im pretty sure it is B. Earths temperature

Explanation:

Answer:

Explanation:

The reason this is a scam is because they are selling sodium and to sell this product you must have a licence to do so. And secondly, you cant tell the reader that it is from a secret river and sell them a product that reacts when it touches water.

Sodium is a very highly reactive metal that does not occur in free state in nature.

Sodium is a group 1 element. It has a very negative electrode potential which implies that it is highly reactive. Being a highly reactive element, sodium can not occur in free state in nature. It always occurs in combined form as compounds.

Hence, it is impossible to pick up sodium from any secret river in the mountains. Sodium metal is highly reactive hence it has to be stored under paraffin oil. The whole set up is indeed a scam.

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answer:

IMAGE IS SUPER UNCLEAR SORRY LUV <3

explanation:

your phone must me from 2009 with that trash camera quality sweetie i suggest you get a new one... oh wait you can't you're broke :(

Answer:

yes

Explanation:

Answer:

Neon is a noble gas

Explanation:

It is important to note that the excitation energy of even the lowest excited states of noble gases is greater than the ionization energy of many atoms of other elements.

This is because, the electrons in a noble gas are contained in a filled shell with greater stability than the the atoms of other elements.

Hence, it becomes difficult to excite the neon atom to a higher energy level.

Recall that photons are emitted when atoms of elements return to ground state after being excited to higher energy level.

Since it is difficult to excite neon, it is also difficult to cause photons to be emitted from neon.

Answer:

I believe the answer is all amoeba come from other amoeba

Answer: Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay

afloat.

Explanation: Hope it helps :)

Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay.

Water:

The Earth is made up of 75% water. river, lakes, sea are some of the sources of water. Hydrogen bonds between the water molecules help to bind the molecules together.

Water molecules has cohesive property, due to this cohesive property all the hydrogen molecules bugs can easily afloat on surface of water.

There are the two types of properties such as cohesion and adhesion. Cohesion allows insects to walk.

Option C is the correct answer.

Therefore, Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay.

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Answer:

The number of protons

Explanation:

Answer:

number of negative electric charger

explanation

(the electrons ) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral .

Answer:

Im not sure because you might have spelled a word wrong.But i believe because of their certain treaditions,belifs,and ways.

Explanation:

Answer:

B

Explanation:

J.J. Thomson

The plum pudding model is an early 20th century model of an atom. It was later found to be wrong. It was proposed by J.J. Thomson in 1904, after the electron had been discovered, but before the atomic nucleus was discovered.