Which formula is an ionic compound?
A.NaF
B.N2
C.NO2
D.CO2

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Answer:

Gamma rays

Explanation:

The waves with higher frequencies will have higher energies and gamma waves have the highest frequencies on electromagnetic scale ,because of this reason gamma waves is the answer.

Answer:

It's right

Explanation:

Answer:

Helium

Explanation:

Answer:

Explanation:

Electrons absorb energy in photons. This makes the eclectron excited. An electron in an excited state can release energy and fall to a lower orbit

Volume of O₂ = 1.12 L

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Reaction

4Na+O₂ ⇒ 2Na₂O

Ar Na = 23 g/mol

[tex]\tt mol=\dfrac{4.6}{23}=0.2[/tex]

[tex]\tt \dfrac{1}{4}\times 0.2=0.05[/tex]

Assume at STP (0 C, 1 atm), 22.4 L for 1 mol , then volume of O₂ :

[tex]\tt 0.05\times 22.4=1.12~L[/tex]

Answer:

B. or .0236

Explanation:

Multiply the 3 sides to get 558.095, then divide the mass and volume to get .0236

Most metals are not liquid at room temperature. Therefore, option A is correct.

Most metals are not liquid at room temperature, except for a few specific exceptions such as mercury (Hg) and gallium (Ga). These metals have relatively low melting points, which allows them to exist in a liquid state at or near room temperature.

The majority of metals, however, exhibit a solid state at room temperature. This solid state is characterized by a regular arrangement of atoms or ions in a crystal lattice structure. The strength of metallic bonds holds the atoms together, giving metals their solid and rigid form.

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Answer:

density = 2g/cm³

Explanation:

density = mass/volume

mass = 20g

volume = 10cm³

density = 20g/10cm³

density = 2g/cm³

Considering the definition of covalent and ionic bond, the type of bonding that would be expected between the following atoms is:

The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas.  

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.

Taking into account the previous definitions, it is first necessary to know if the elements are metallic or non-metallic:

Now you can determine the type of bond of the following pairs of elements:

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Answer:

D odor

Explanation:

Answer: odor

Explanation:

Answer:

Max Planck discovered the quantum of action

Explanation:

Answer:

A

Explanation:

When you crumble a piece of paper it make a sound plus i just did on apex

When we crumple a piece of paper in our hands, a part of the energy is transformed into sound energy. Therefore, option (A) is correct.

Sound transmits through the medium such as liquids, gases, and plasma in the form of longitudinal waves or compression waves. It requires a medium to propagate as it can travel through solids as both longitudinal and transverse waves.

Transverse sound waves exhibit waves of alternating shear stress perpendicular to the direction of propagation while Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction.

Generally, waves move matter up and down but do not carry along.  When we crumple the paper with our hands the kinetic energy of our hands is used to deform the paper but at the same time, we can listen to some sound which indicates that some energy is transformed into sound energy.

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Answer:

your awnser is B cutting back

Answer:

All the above

Explanation:

Answer:

reactivity

Explanation:

Answer:

3

Explanation:

Answer:

There are 3 estimated digits.

Explanation:

Answer:

IT IS REAL

Look it up

Answer:

look close the answers are circled in blue

the answer to number 2 is element #14, Yorkel

Answer:

See explanation

Explanation:

It is important to know the properties and chemical formulas of ionic and molecular compounds because, knowledge of the properties of a compound aids you in deciding how to use the compound, how to store it and how dangerous it can be. Knowledge of its formula is the first step towards identifying its properties since most chemicals occur in groups having similar chemical/physical properties.

Knowledge of the chemical properties and formula of bleach and drain cleaner will help you to decide which product is a better cleaning agent based on its chemical composition. This will help you as the user to make  better decision.

Learning about atomic structure has made me to understand that all matter in the universe are composed of atoms. indeed, certain occurrences in nature can only be explained on the basis of atoms involved.

Answer:

yes

Explanation:

because they will bond in order to gain more stability which is gained by forming a full electron shell

Answer:

Scientific ideas are changed when better ones are found.

Explanation:

The outermost shell of each carbon atom has four electrons. In diamond, these electrons are shared with four other carbon atoms to form very strong chemical bonds resulting in an extremely rigid tetrahedral crystal. It is this simple, tightly-bonded arrangement that makes diamond one of the hardest substances on Earth.

Answer: Diamond is hard due to its giant covalent lattice and it has many strong covalent bonds.

Explanation:

Answer:

b sorry if im wrong

Explanation:

hope it helped

Answer:

C. Bohr’s model showed that electron orbits had distinct radii

Explanation:

In Rutherford's atomic model, the electrons moved on arbitrary orbits, which was only due to the condition that the Coulomb force acts as a radial force. In Bohr's atomic model, only very specific orbits were allowed, which were determined by Bor's quantum condition.

Answer:

C i agree

Explanation:

Answer:

Yes Because the calculated volume is more accurate because you are able to measure the smaller dimensions.

~Apex lab

Answer:

Explanation:

They can be reflex lol

Answer:

80 hours. 2,000 ÷ 25 = 80