Answer: Many elements have one or more isotopes that are radioactive. These isotopes are called radioisotopes.
Answer:
Many elements have one or more isotopes that are radioactive. The isotopes are called radioisotopes
I need help with this ASAP PLEASE!! WILL MARK BRAINLIEST!!
Write the following value in decimal form
8.99 x 10^-7
Answer:
0.000000899
Explanation:
8.99x10^-7
move the decimal to the left 7 times.
0.000000899
Answer:
0.000000899
Explanation:
.,.......,.........
Write the following value in decimal form
2.2 x 10^2
Answer:
220
Explanation:
2.2 x 10^2
You just move the decimal two units to the right...
Hope this helps:)
which characteristic that a scientific measuring tool should have?
Answer:
metric system
Explanation:
Scientists use the metric system, which uses the following base units: 1. Meter for length 2. Gram for mass 3. Liter for volume 4. Second for time Different prefixes
i need some help all of this stuff is due soon
Answer:
A is one of them.
Is there more?
B and D if I'm not mistaken.
The lightning storm is just what you'd expect it to be, and the comb is collecting particles of what looks like paper?
Anyway, the rock and the magnet are forcefully pulling the metal objects towards it with electromagnetism.
Find the force of the mass is 6kg and the acceleration is 12 m/s/s
Answer:
72N
12m/s
Explanation:
f=ma
=6×12
=72N
a=f÷m
=72÷6
=12m/s
Which piece of ice has the most themal energy
A. 10,000 g ice sculpture at -1c
B. 10 g ice cube at -1c
it's B
Explanation:
just because 1111111111111111111
A proton is a subatomic particle carrying a charge equal to but opposite that of an electron
true
false
Answer:
True
Explanation:
A proton has a charge of +1, while an electron has a charge of -1. This is why a neutral atom has the same number of protons as electrons.
Neutrons have no charge, hence their name neutron which is similar to neutral.
Characteristics help scientists ______objects.
(A) isolate
(B) identify
(C) theorize
(D) quantify
Answer:
b
Explanation:
identify objects.
what is the density of the football
How do you make an atom of F become Ne?
Answer:
If atoms gain electrons, they become negative ions, or anions. ... A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -
Explanation:
Answer:
Add and electron and a proton
Explanation:
You would have to add a proton and an electron to F to get it to be Ne
A hot lump of 30.5 g of iron at an initial temperature of 52.7 °C is placed in 50.0 mL H2O initially at 25.0 °C and allowed to reach thermal equilibrium. What is the final temperature of the iron and water, given that the specific heat of iron is 0.449 J/(g·°C)? Assume no heat is lost to surroundings.
final= _______ degrees Celsius
Answer:
26.7°C
Explanation:
Using the formula; Q = m × c × ΔT
Where; Q = amount of heat
m = mass
c = specific heat
ΔT = change in temperature
In this question involving iron placed into water, the Qwater = Qiron
For water; m= 50g, c = 4.18 J/g°C, Initial temp= 25°C, final temp=?
For iron; m = 30.5g, c = 0.449J/g°C, Initial temp= 52.7°C, final temp=?
Qwater = -(Qiron)
m × c × ΔT (water) =- {m × c × ΔT (iron)}
50 × 4.18 × (T - 25) = - {30.5 × 0.449 × (T - 52.7)}
209 (T - 25) = - {13.6945 (T - 52.7)}
209T - 5225 = -13.6945T + 721.7
209T + 13.6945T = 5225 + 721.7
222.6945T = 5946.7
T = 5946.7/222.6945
T = 26.7
Hence, the final temperature of water and iron is 26.7°C
what are the representative elements usually called
Answer:
There are two sets of groups in the periodic table. The first set are Group A elements and are also known as representative elements. The second set are Group B elements and are also known as transition metals. Representative elements are the most abundant elements on earth.
what is generally true about the compressibility of solids?
Answer:
That it is hard to compress
Explanation:
What are 2 mixtures and explain your answer
Air
Orange juice
Silver
Sodium chloride
Water
A substance that conducts electricity, is malleable, ductile, and has luster would be classified as a
A) compound.
B) element.
C) metal.
D) nonmetal.
is chemistry notconcerned with exploring and inventing materials for use.
Answer:
no it's part of chemistry to play thing exploring OR not.
Explanation:
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
Potential energy is based on an objects
A)gravity
B)mass
C)position
D)kinetic
Answer:
c
Explanation:
because potential energy is created with the position of a body when you pick up something the thing will have stored energy which is transferred from you so the stored energy is potential energy created by the position of a body that when you see over your head you scared of that thing not to bit you because it has stored energy if you see the thing already failed on the ground you wouldn't scared of that because the enery is already gone
Hope help you
Think about atoms, molecules, elements, and compounds. How can you relate it to your own body? To the world around you, right now? Please explain in four sentences.
Answer:
Everything we see comes from the transferring of electrons, or redox reactions. Fire, the screen you are staring at, and many other chemical reactions that happen everyday, we don't even care to notice anymore. Everything in our bodies is made up of compounds, from simple things such as H2O, and to the food we eat, loaded with sugar, C12H22O11. From the para-benzoic acid on your sunscreen, to the O3 in the ozone layer high above us.
Explanation:
can someone call me and help me with chemistry
860-833-8822
Answer: okay
Explanation:
Answer:
What exactly do you want help with
Explanation:
What are some uses we might have for standing waves?
The thick soil accumulation of fine-grained particles is called: O Sediment Loess O Gravel O Silt
The thick soil accumulation of fine-grained particles is called as silt
Which of the following types of soil has the greatest permeability?
A. Loam
B. Sandy
C. Clay
D. Silty
Answer:
Sandy soil
Explanation:
Sandy soil has the greatest permeability of all soil types. It has a high amount of pore space and grain size.
Permeability is the ability of fluids to pass between the grains of a substance, here soil. It is usually a function of the size of the pore spaces and the grain size.
Sandy soils are usually made up of particles with sand-sized shapes and dimension. They have bigger and finer grains with little to no cement. This allows for a high level of permeability with no impediment to flow.Clay soil has very fine grain and with very low permeability. Silty soils have fair enough permeability and the permeability of loam straddles between that of sand and clay.Permeability is very important for determining the quality of soils.
In a one or two paragraph summary explain why Sodium light is Orange and Potassium light is lilac when placed in a flame.
Use the words: electron, quantum jump, ground state, orbitals, photons, emitting, absorbing, light spectrum, energy mass (words are not in order)
Answer:
?
Explanation:
bhag bhag aaya sheer
Answer:
i dont undersstand lol
Explanation:
Explanation:
bhag bhag aaya sheer
..........
What group will elements in the 7th column bond to?
Which is always the first step in dealing with an accident in the lab?
A. Call the emergency number, 911.
B. Call the fire department.
C. Notify the teacher.
D. Read the MSDS information.
An atom of an element contains 6 protons, 6 neutrons, and 6 electrons. An atom that is a different isotope of this element would contain —
A.
6 protons, 7 neutrons, and 6 electrons.
B.
6 protons, 6 neutrons, and 7 electrons.
C.
7 protons, 6 neutrons, and 6 electrons.
D.
7 protons, 7 neutrons, and 7 electrons.
Answer:
A
Explanation:
An atom that is a different isotope of a given element would contain 6 protons, 7 neutrons, and 6 electrons. Therefore, option (A) is correct.
What is an isotope?Isotopes are atoms of an element that contain the same atomic number as the original element but a different atomic mass. Isotopes of an element possess the same number of electrons and the number of protons but different numbers of neutrons in their respective nucleus.
For example, the isotopes of carbon are carbon-14, carbon-13, and carbon-12. Carbon-14 has a total of 8 neutrons, carbon-13 have a total of 7 neutrons, and carbon-12 has a total of 6 neutrons. So all the isotopes of carbon have different numbers of neutrons.
Given element has 6 protons, 6 neutrons, and 6 electrons. So the isotope of this element will have 6 protons, and 6 electrons but not 6 neutrons. Therefore, the element with 6 protons, 7 neutrons, and 6 electrons is the isotope of the given element.
Learn more about isotopes, here:
brainly.com/question/11680817
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How does the average reaction rate differ from an instantaneous reaction rate?
Answer:
The average rate is the change in concentration over a selected period of time. It depends on when you take the measurements. The instantaneous rate is the rate at a particular time.
Explanation:
an object has a mass of 57.6g . find the object's density, given that's it's volume is 40.25cm^3
Answer:
The answer is 1.43 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 57.6 g
volume = 40.25 cm³
We have
[tex]density = \frac{57.6}{40.25} \\ = 1.431055900...[/tex]
We have the final answer as
1.43 g/mLHope this helps you
Is water an element?
a:yes
b:We can't tell from a periodic table
c:No
Answer:
no it is not. The name refers to the chemical formula of water H20 so water is made from elements, but is not itself an element
