Answers
Isotopes are atoms of the same element that have different numbers of neutrons. Protons are positively-charged particles found in the nucleus of an atom.
Electrons are negatively-charged particles found in the outer shell of an atom. The charge on an element is determined by the number of protons and electrons present in the atom.
a.) Li+: number of protons = 3
Number of electrons = 2
charge of Li+ = +1
b.) Be2+: number of protons = 4
Number of electrons = 2
charge of Be2+ = 2+
c.) C4+: number of protons = 8
Number of electrons = 4
charge of C4+ = 4+
d.) O2-: number of protons = 8
Number of electrons = 10
charge of O2- = -2
e.) N3-: number of protons = 7
Number of electrons = 10
charge of N3- = -3
f.) C4- : number of protons = 4
Number of electrons = 4
charge of C4- = -4
g.) 14C6: The mass number = 14
Atomic number = 6
Number of neutrons = 8
h.) 18O8: The mass number = 18
Atomic number = 8
Number of neutrons = 10
i.) 19F9: The mass number = 19
Atomic number = 9
Number of neutrons = 10
j.) 40Ca20: The mass number =40
Atomic number = 20
Number of neutrons = 20
k.) 37Cl17: The mass number = 37
Atomic number = 17
Number of neutrons = 20
l.) 238U92: The mass number = 238
Atomic number = 92
Number of neutrons = 146
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Related Questions
Please help I’ll give you guys brainiest!
Thank youuuuuuu :))
Answers
Answer:
Balanced.
Explanation:
Both sides are pulling with equal force.
Answer/Explanation:
These forces are balanced. In order for forces to be balanced they must be pulling/pushing the same amount of net force in opposing directions.
In order for forces to be balanced they must be pulling/pushing in opposing directions but with differentiating net force.
Classify each of the following elements as
a metal, a nonmetal, or a metalloid:
boron, carbon, aluminum, and silicon.
Answers
The non-metals are boron and carbon. The metal is aluminum and the metalloid is silicon.
Explanation:
non-metal = boron, carbon
metal = aluminum
metalloid = silicon
Non-metal = boron, carbon
Metal = aluminum
Metalloid = silicon
What is metal?A solid material which is lustrous, hard, shiny, malleable, and sonorous with good electrical and thermal conductivity.
Metal is an element which is typically hard, shiny, fusible, malleable, and ductile, with good electrical and thermal conductivity.
A nonmetal is an element that does not have the properties of a metal.
A metalloid is an element having intermediate properties of both metals and nonmetals.
Hence,
Non-metal = boron, carbon
Metal = aluminum
Metalloid = silicon
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Which element in Group 18 of the Periodic Table has the highest lonization energy?
Answers
all the elements in group 18 are Nobel gases or inert gases . all the elements such as neon , helium, argon etc. ,their outermost shell is completely filled . The noble gases have the largest ionization energies, reflecting their chemical inertness
Do the earth plates ride on the crust or mantle?
Answers
Answer:
Mantle
Explanation:
The crust is also known as earths tectonic plates
HELP ASAP
1. a hurricane destroyed an entire city, what category would it most likely be?
a Category 4 or 5
b Category X or Y
c Category 1 or 2
d Category A or B
2. What happens immediately after a hurricane makes landfall?
a It starts hailing.
b Its winds pick up speed.
c It gets stronger.
d It gets weaker.
Answers
Answer:
1. category 4 or 5
2. it gets weaker
Hello guys sorry for spamming again but I have to do this whole thing and the end of trimester for my school is today so I need to get good grades especially is science so here is the image please answer that. Thanks!!
Answers
Answer:
all you need if yo look up and say do plants grow without soil but yes they can grow without soil but they cannot grow without the necessities that soil provides.
What are some ways that scientists use to model chemical reactions?
Answers
Answer:
they identify factors that affect chemical processes then they determine the amount of substance produced or consumed then predict the amount of energy released or absorbed
what unit is a wave velocity measured in
Answers
Answer:
radians
Explanation:
Answer:
Meters per second.
Explanation:
Ap3x approved
How many molecules of SrCrO4 are in a sample of SrCrO4 0.556 moles?
Answers
Answer:
[tex]3.35*10^{23}\ SrCrO_4\ molecules[/tex]
Explanation:
[tex]We\ are\ given\ that,\\No.\ of\ moles\ of\ SrCrO_4=0.556\\Hence,\\As\ we\ know\ that,\\No.\ of\ particles=Avagadro's\ Constant*No.\ of\ moles\\We\ already\ know\ that\ Avagadro's\ Constant=6.022*10^{23}\\Here,\\No.\ of\ SrCrO_4\ molecules= 6.022*10^{23}*0.556\\Hence,\\No.\ of\ SrCrO_4\ molecules=3.348*10^{23} molecules\ \approx 3.35*10^{23}\ SrCrO_4\ molecules[/tex]
EMERGENCY!!! Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers
Answers
Answer:
A. the valence electrons
Explanation:
Answer:
The valence electrons
Explanation:
The valence electrons determine an element's properties because chemical properties of each element are determined by the element's electronic configuration and PARTICULARLY by its outermost valence electrons. I hope it helps!
~Good luck
Elements in group 17 want to lose seven valence electrons and elements in group 1 want to gain seven valence electrons to become stable ions.
Answers
Metallic bonds are formed because valence clectrons are -
A. Fixed to each metal atom
B. Shared between many metal cations
Answers
will mark brainliest
Answers
Answer:
D. water
Hope it will help you......Julio measured the weight of a grain of sand and found it to be 3.5 times 10 Superscript negative 10 kg. He also measured the weight of one hair from his eyebrow and found that to be 7 times 10 Superscript negative 8 kg.
What is the total weight of both objects?
3.507 times 10 Superscript negative 10 kg
7.035 times 10 Superscript negative 10 kg
3.507 times 10 Superscript negative 8 kg
7.035 times 10 Superscript negative 8 kg
Answers
The total weight of both objects : 7.035 x 10⁻⁸ kg
Further explanationGiven
The weight of a grain of sand : 3.5 x 10⁻¹⁰ kg
The weight of one hair from his eyebrow : 7 x 10⁻⁸ kg
Required
The total weight of both objects
Solution
Scientific Notation consists of 2 parts
1. the first part: the first digit followed by the decimal point
2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point
To add/subtract, the exponents must be the same and then add/subtract the coefficient
convert the largest exponent (7 x 10⁻⁸)7 x 10⁻⁸ = 700 x 10⁻¹⁰
add the coefficients[tex]\tt =(3.5+700)\times 10^{-10}\\\\=703.5\times 10^{-10}\\\\=7.035\times 10^{-8}[/tex]
Answer:
in other words its: d
Explanation:
Convert 500 mL to L
Answers
Answer:
0.5L
Explanation:
1L = 1000 ml
0.5L
Answer: 0.5
Explanation:
The three types of ocean floor sediments are classified according to their _____.
Answers
Answer:
Origin
Explanation:
How many atoms of oxygen are represented in 2CaNO3?
Answers
Answer:
6 atoms of oxygen
Explanation:
What happens when you put an ice-pop outside? This is for the people who don’t know
Answers
Answer:
It melts
Explanation:
Answer:
It melts?
Explanation:
You have 286.7g of PbO. For lab, you need 2.50M PbO. How much PbO can you make? Don't forget your units.
Answers
Answer:
0.514 L (liters)
Explanation:
I took the Quizziz, and hope this helps!If you have 6.02x10^23 molecules of trisulfur monoxide, how many grams would it weigh?
Answers
Answer:
112.18 g.
Explanation:
you're using stoichiometry to find the mass of the compound S₃O.
can i have some help :'(
manganese atom has 30 neutrons and atomic number 25
calculate the atomic mass of manganese atom
Answers
The atomic mass of manganese atom : 55
Further explanationGiven
Manganese (Mn) atom has 30 neutrons
atomic number 25
Required
the atomic mass
Solution
The atomic mass=number of protons+number of neutrons
The atomic number = number of protons=number of electrons
The number of protons=25, so the atomic mass :
[tex]\tt =ptotons+neutrons\\\\=25+30\\\\=55[/tex]
What would the formula be for Molybdenum V Carbonate?
Answers
Answer:
CMoO3 - PubChem.
Explanation:
Convection currents in Earth's mantle are caused by the rise of hot material rising towards the crust, becoming cooler and sinking back down. This process occurs repeatedly, causing the currents to constantly flow. The movement of the currents plays a factor in the movement of the mantle.
Answers
Answer:
True or False
Answer - True
Explanation:
The mantle convection clearly describes how the mantle moves, transferring heat from the white-hot core to the lithosphere. The mantle is usually being heated below and the cooling happens above and the general temperature of the area gets dropped over a long period of time.
Hot buoyant Magma is being transferred through convection currents, to the lithosphere at the plate boundaries and hot spots. Also, convection current moves cooler materials from the crust to the interior of the earth through a process that is widely known as subduction.
Please help!! I was sick when he went over this
Answers
Answer:
5.70×10^-11 m
Explanation:
What is the name of the warm phase associated with melting ice and higher sea level? PLSSSSSSS ILL GIVE 5 STARS PLSSS JUST PLS HELP ME ITS FOR MY MIDTERM REVIEW ;-; ITS DUE TODAY!!! PLSSS
Answers
Global Warming
Explanation:
The melting of the polar ice caps due to mostly negative human interactions with the environment.
Which periodic table trend is represented by the blue arrows?
Answers
Answer:
Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties. Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. Periodic trends, arising from the arrangement of the periodic table, provide chemists with an invaluable tool to quickly predict an element's properties. These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements.
A student calculates the density of an unknown solid. The mass is 10.04 grams, and the volume is 8.21 cubic centimeters. How many significant figures should appear in the final answer
Answers
Answer:
1.22 g/cm³
Explanation:
Density = mass ÷ volume
Mass = 10.04 grams
Volume = 8.21 cubic centimeters
Density = mass ÷ volume
= 10.04 ÷ 8.21
= 1.2228989037758 g/cm³
Approximately
1.22 g/cm³ to 2 significant figure.
The final answer should be approximated to 2 significant figure because the mass and volume of the objective given is in 2 significant figure
1. distance = 10 m
time = 2 s
What is this object's speed?
Answers
10m/2s = 5m/s
The speed is 5 m/s
Answer:
5m/s
Explanation:
2s ÷ 2 = s
10m ÷ 2 = 5m
5 meters per second or 5m/s
Why dont people brush their teeth?Like some be going around people and everything,UGHHHHH!
Please tell me
Answers
Answer:
like so true just brush your teeth... if you can't afford it then no disrespect to you
Explanation:
Answer:
their fault when the grow up and have yellow teeth + dentures and they are like 28 XD
Explanation:
A body is moving with an acceleration of 60 m/s2. If the force applied to t
body is 42000 N, calculate its mass
Answers
Explanation:
Fnet = ma
m = Fnet/a = 42,000N/(60m/s²) = 700kg.