All of the alkaline earth metals are similar in that – they are all artificially made elements they all have similar atomic weights. they all have the same ionic charge. they all show variable valences.
Answer:
they all have the same ionic charge.
Explanation:
Alkaline earth metals are group 2 metals on the periodic table. They are divalent elements because they have two valence electrons and ionize by donating these two valence electrons. Elements in this group have the same numbers of electrons in their outermost shell of their atoms. i.e. they all have the same number of valence electrons and ionic charge.
What Group would this element be in?
Answer:
Non-metals because it has 9 electrons meaning it is fluorine
Explanation:
The process of making proteins is called protein
Answer:
protein sysnthesis
Explanation:
Advantages and disadvantages of solar power
Answer:
Advantakes= it is a renewable source, you can but it anywhere with sunlight
disatvantage= it cost a lot to place/replace, it uses a lot of different materials
Plz I need help with this stuff!!!!!!!!!brainly wouldn’t let me post the other pics
What is the name of the following chemical compound?
Answer:
Iron(II) oxide
Explanation:
Iron(II) oxide or ferrous oxide is the inorganic compound with the formula FeO. Its mineral form is known as wüstite.
500 mL solution of calcium chloride with a concentration of 0.75 mol/L. The mass of solute needed to make this solution is ___ ___ ___ ___ g.
Answer:
41.63g
Explanation:
Given parameters:
Volume of CaCl₂ = 500mL = 0.5L
Concentration = 0.75mol/L
Unknown:
Mass of the solute needed = ?
Solution:
The mass of the solute can be derived using the expression below;
Mass = number of moles x molar mass
But,
Number of moles = Concentration x Volume
So;
Mass = Concentration x Volume x molar mas
Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol
Mass = 0.75 x 0.5 x 111 = 41.63g
Anyone know the answer
Answer:
a and d
Explanation:
a bromine and the calcium atom loses two elections
The
the surface area of the reactants, the faster the reaction rate.
A. greater
B. lesser
A car travels 65 miles in 1 hour. What is the average speed of the car?
What do you call the meetings of two planets/objects as seen from the earth? hurrry ASAP!!!!!
Answer:
It's called "Great conjunction"
A glass of fresh milk with 4% fat is an example of *
4 points
a heterogeneous mixture.
an element.
a homogeneous mixture.
a compound.
Answer:
heterogeneous
Explanation:
composition is not uniform through out
What is the name of an element that has a full octet?
Answer:
noble gases
The noble gases rarely form compounds. They have the most stable configuration (full octet, no charge), so they have no reason to react and change their configuration. All other elements attempt to gain, lose, or share electrons to achieve a noble gas configuration
Explanation:
PLEASE MARK ME AS BRAINLIEST
Which two characteristics are associated with metals
Answer:
high electrical and thermal conductivity
Answer:
Metals donate electrons.
They are good conductors of heat and electricity.
In a metal lattice, the metal ions are _____ and they are _____.
Answer:
a.)cations; free to move around
b.)cations; fixed in place
What is the condensation AND freezing point of water C AND F!!
Answer:
Condensation 212F or 100C, Freezing 32F or 0C
Explanation:
Condensation 212 degrees Fahrenheit or 100 degrees Celsius.
Freezing point 32 degrees Fahrenheit or 0 degrees Celsius.
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Which problem cannot be solved using the scientific method?
determining which student reads faster
discovering who invented the radio
discovering how much salt should be used to boil water faster
determining which laundry detergent works best
Answer:
I would say discovering who invented the radio.
Explanation:
The other ones can be solved by experiments and the "discovering who invented the radio" cannot be solved by an experiment.
hope this helps.
Answer:
I would say who invented the ratio
Explanation:
Well you dont need to use the scientific method to know WHO discovered it, you use it to determine HOW
what would most likely be joined by an ionic bond?
Answer:
magnites
Explanation:
i dont know what this is so sorry but my guess is magnites.
Answer:
Your a bad person, i gave 100 points for just 3 paragraphs and you and another person just put 1 sentence, you have a bad moral
Explanation:
By examining the diagram, which of the following is NOT needed for photosynthesis:
O sunlight
O carbon dioxide
O water
oxygen
The cause of the phases of the moon Is a cycle that is close to - long
Answer: 28 days.
Hope this helps...... Stay safe and have a Merry Christmas!!!!!!!!! :D
FOR 35 POINTS & A BRAINIST*
1.) For an atom of sulfur, there are
A.) two electron shells with 6 valence electrons
B.) three electron shells with 6 valence electrons
C.) four electron shells with 6 valence electrons
D.) five electron shells with 6 valence electrons
2.) Which atom has four electron shells with 7 valence electrons?
A.) F
B.) CI
C.) Br
D.) I
3.) Which atom has three electron shells with 8 electrons in its outermost orbit?
A.) He
B.) Ne
C.) Ar
D.) Kr
4.) Which method should be used to draw electrons that are involved in a collision during a chemical reaction?
A.) Bohr's model
B.) Lewis dot model
C.) Addition model
D.) Subtraction model
For all of these it’s Explanation with support:
1. The color of a solution identifies if it is an acid, base, or neutral solution
2. Which solution is basic
3. How will adding water effect the pH
Answer:
1. A
Explanation:
1.A True we can identify solutions based on the color of the solutions. If you look at our universal PH color chart. Red, Orange, and yellow are acids.
2. D, If you look at the pH levels. Both B and C have a pH level equal to or greater than 7. Note that any pH level 7 or higher is a basic solution.
3.A
Looking at the pH level we can see that this is an acidic solution. So, by adding more water. The acidity will lessen.
Hair is composed of a protein called cellulose
O
True
O False
Answer:True
Explanation:
Iv done this before
Which one is not acid? Na₂O or CO₂
Answer:
It is Na2O because it doesn't show any acidic properties.
What is the total number of electrons in an atom of an element with an atomic number of 18 and a mass number
of 40?
a. 58
c. 22
b. 18
d. 40
Answer:
18
Explanation:
In neutral atom protons and electrons are equal in number as it atomic number or proton number is 18 so electrons are also 18
The total number of electrons in an atom of an element with an atomic number of 18 and a mass number of 40 is 18.
What are the difference between atomic number and atomic mass ?Atomic mass can be defined as the total number of neutrons and protons located in nucleus of an element while atomic number is the number of protons present in the nucleus of element.
Atomic mass can be defined as the average weight of an element where as the atomic number is the total number of protons present in the nucleus; Atomic mass have the symbol A while atomic number have the symbol the letter Z.
Different isotopes of an element are differentiated by atomic mass is while isotopes share the same atomic number, in neutral atom protons and electrons are equal to atomic number or proton number is 18 and electrons are also 18
Learn more about atomic number, here:
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A beaker containing 6.32 moles of PBr3, contains___
molecules of PBrz.
A) 1712.7
B) 3.1 x 10^24
C) 3.8 x 10^24
D) 271
Answer:
3.8 x 10²⁴molecules
Explanation:
Given parameters:
Number of moles = 6.32moles
Unknown:
Number of molecules = ?
Solution:
The number of moles can be used to derive the number of molecules found within a substance.
Now,
1 mole of substance contains 6.02 x 10²³ molecules
6.32 mole of PBr₃ will contain 6.32 x 6.02 x 10²³ = 3.8 x 10²⁴molecules
3. Why do gases deviate from the ideal gas law at high pressures? A. Molecules have finite volume. B. Cohesive forces increase the volume from the ideal. C. Increasing pressure increases the temperature of the gas. D. Collisions between molecules occur more frequently as pressure increases.
Answer:
A. Molecules have finite volume.
Explanation:
Gases deviate from the ideal gas law at high pressures because its molecules have a finite volume.
Real gases have a finite volume which enables more interaction between the molecules while ideal gases are assumed not to have a finite volume or occupy space which is why it lacks any form of interaction between its molecules.
This difference is the deviation between the real and ideal gases.
What patterns do you observe in the data?
Explanation:
What type of graph is most appropriate to present the data in Table 4? Create a graph of the data in Excel or another graphing software and submit it to your instructor.
Develop a detailed hypothesis for your experiment.What would your experimental approach be to test this hypothesis? Be detailed in your description of the experiment.
6.What are the independent, dependent, and controlled variables in your experiment?
What type of graph would be appropriate for this data set? Why?
a compared of magnesium nitric contains 72% of magnesium and 28% of nitrogen. what is the empirical formula of magnesium nitric.
and the answer is Mg 3 N 2
how to do the solution.
The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components
The principle of determining empirical formula
• Determine the mass ratio of the constituent elements of the compound.
• Determine the mole ratio by dividing the percentage by the atomic mass
The empirical formula :
mol ratio Mg : N ⇒
[tex]\tt =\dfrac{72}{24~g/mol}\div \dfrac{28}{14~g/mol}\\\\=3\div 2\rightarrow Mg_3N_2[/tex]
Using the model,what is the mass of the atom pictured?
A)3amu
B)5amu
C)7amu
D)9amu
Answer:
with 20 protons (p=20) and 22 neutrons (n=22)? 47 ... Listed below are the charges and masses of four ... a) +2,2 amu c ) +1, 1 amu least b) ... pudding” Model.
Explanation:
Answer:
7amu
Explanation:
Atoms are composed of three particles. The proton, neutron, and electron.
The mass of the atom in amu is just the number of protons and neutrons in the nucleolus since they both have a mass of about 1 amu. Electrons are not counted since they have an incredibly small mass that ultimately does not matter.
This atom has 3 protons (positively charged particle) and 4 neutrons (particle with no charge) which together gives a mass of 7 amu.