Help please and thank you so much

Answer:francium

The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

Explanation:

The least measure of the energy needed to remove the loosely bound electron of an atom or a molecule is called ionization energy.

The correct order from lowest to highest first ionization energy is:

This can be explained as:

Therefore, Cesium will have the least ionization energy as compared to sodium, aluminium and argon.

To know more about ionization energy follow the link:

https://brainly.com/question/2571722

Explanation:

Answer:

The density and salinity goes down.

Explanation:

Salt water is denser than pure water.  As fresh water is added to salt water the concentration of salt goes down.  Since salinity is the amount of salt in the water that would go down with the concentration.  This would also mean that the density goes down since there is less salt per unit of volume which makes it so that there is less mass per unit of volume.  The formula for density is d=m/v so as the mass goes down per unit of volume so does the density.

Let me know if anything is unclear in the comments and we can try to work through it.

Answer:

the answer is c I took the test

Answer:

C

Explanation:

the sun's rays strike the earth's surface mostly directly at the equator

Identical electron configurations : K⁺ and Cl⁻

In an atom, there are levels of energy in the shell and sub-shell  

This energy level is expressed in the form of electron configurations.  

Charging electrons in the sub-shell uses the following sequence:  

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  

S²⁻ : [Ne] 3s²3p⁶

Cl : [Ne] 3s²3p⁵

K⁺ : 1s² 2s² 2p⁶ 3s² 3p⁶

Cl⁻ : 1s² 2s² 2p⁶ 3s²3p⁶

S :[Ne] 3s²3p⁴

Ar : [Ne] 3s²3p⁶

Cl⁻ : 1s² 2s² 2p⁶ 3s²3p⁶

K : 1s² 2s² 2p⁶ 3s² 3p⁶4s¹

Answer:

Neon emits only a specific color

Explanation:

While sunlight emits all the colors neon light emit a single color

Answer:

Beryllium

Explanation:

They are in the same group

Answer:

B

Explanation:

The blubber is so thick acts as installation

Answer:

I think the answer is B.

Answer: 50 degrees Celsius is hotter than 50 degrees F. 50 degrees Celsius is half way between freezing and boiling

Answer:

B : THEY FORM NEW SUBSTANCES WITH NEW PROPERTIES .

According to the concept of solubility,applying heat often speeds up the process of dissolving particles.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

Learn more about solubility,here:

https://brainly.com/question/9098308

#SPJ2

Answer:

The clear liquid is less dense than the black liquid, which is why it floats on top. If the volume were different, you would visually see more clear liquid than black and vice versa.

The clear liquid is less dense than the black liquid

Answer:

A. The clear liquid is less dense than the black liquid

Explanation:

Since the clear liquid since on top of the black one it's density is less. Whatever liquid has a higher density will sink to the bottom of the flask.

Answer:

Lead(IV) iodide

Explanation:

Answer:

Plasmid #50548

Explanation:

Answer:

Your answer would be mechanical.

Explanation:

Hope you do good BRAINLYISETTT

Answer:

C. Br and Cl

Explanation:

When Br and Cl combines they share electrons between them to form a type of bond called covalent bond.

Taking into account the definition of ionic and covalent bonds,  the pair of atoms Br and Cl will share electrons when a bond is formed between them.

An ionic bond is a type of chemical bond that occurs when one atom gives up an electron to the other, in order for both to achieve electronic stability.

This union normally occurs between metal and nonmetal elements with different electronegativity, which means that the elements have different capacity to attract electrons.

In other words, 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.

On the other side, the covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule.

Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. 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. The shared electron pair is common to the two atoms and holds them together.

In this case, considering that K, Li and Ba are metallic atoms and Cl, I and Br are non-metallic atoms, the pair of atoms Br and Cl will share electrons when a bond is formed between them.

Learn more:

Answer:

Hydrogen ions

Explanation: acids will produce hydrogen ions, I asked my teacher. Please tell me if we are wrong.

Answer:

A hydrogen bond is an intermolecular force (IMF) that forms a special type of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons. Intermolecular forces (IMFs) occur between molecules. Other examples include ordinary dipole-dipole interactions and dispersion forces. Hydrogen bonds are are generally stronger than ordinary dipole-dipole and dispersion forces, but weaker than true covalent and ionic bonds.

Explanation:

Answer:

Option A) Radio waves.

Explanation:

Have a great day.

Answer:

its called drop and swap

Explanation:

Answer:

2.56

Explanation:

C6H12O6 molar mass: 180.15768 g

solute: sugar

molarity = moles of solute / liters of solution

Jones Soda:

33 g / 180.15768 g = 0.18 moles C6H12O6

M = 0.18 g / 0.355 L

M = 0.52

Sierra Mist:

62 g / 180.15768 g = 0.34 moles C6H12O6

M = 0.34 g / 0.591 L

M = 0.58

Sienna Mist has a higher molarity and is more concentrated.

Answer:

because of the process of refraction of light.

Explanation:

Note, the term refraction refers to the process which results in the bending of light as it passes through a medium. This bending of light can make objects become magnified (or larger), or even smaller.

In this scenario, as the light passes slowly through water it affects how we perceive the objects (the words on the paper) behind the jar (more likely a glass jar). In other words, the light combined with the water refracts (changes direction of) the lights our eyes can see, making the letters seem to change size.

Answer:

1) Mesohippus

2) Equus

Explanation:

just did it on e2020

Answer:

Based on the skeleton, the skull, and the leg bones, which fossil is the oldest?

✔ Mesohippus

Which fossil is most like a modern horse?

✔ Equus

Answer:

i fi am not wrong the correct answer is  D

Explanation:

Answer:

The answer is D

Explanation:

More height= more potential energy

Answer:

D Transportation it makes sence if it doesn't just re read it

Answer:

Explanation: