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3 years ago

How much protons are in Li

Physics

2 answers:

harkovskaia [24]3 years ago

6 0

Answer: 3

Explanation:

Lithium always has 3 protons bc it’s atomic number is 3 which is determined by its amount of protons.

V125BC [204]3 years ago

6 0

The number of protons from the element Lithium (Li) is <u>3</u>

<h3>Further explanation </h3>

The Atomic Number (Z) indicates the number of protons in an atom of an element. If the atom is neutral then the number of protons will be equal to the number of electrons. So the atomic number can also indicate the number of electrons.

So atomic number = number of protons = number of electrons

Mass Number (A) is the sum of protons and neutrons

Mass Number (A) = Number of protons + Number of Neutrons

So that the relationship between atomic numbers and mass numbers can be formulated as follows:

Atomic Number (Z) = Mass Number (A) - Number of Neutrons

In the following element notation,

$\large {{{A} \atop {Z}} \right X}$

X = symbol of elemental atom

A = mass number

= number of protons + number of neutrons

Z = atomic number

= number of protons = number of electrons, on neutral elements

The Li element is an element located in group 1A

If we look at the atomic number of elements in group 1A:

• H: 1

• Li: 3

• Na: 11

• K: 19

• Rb: 37

• Cs: 55

• and Fr: 87

So Li has atomic number 3

Because atomic number = number of protons = number of electrons, so the number of protons from the element Lithium (Li) is<u> 3 </u>

<h3>Learn more </h3>

electron affinity

brainly.com/question/1440853

Identify the group number in the periodic table

brainly.com/question/2014634

the charge on each ion in the compounds

brainly.com/question/5880856

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Explanation:

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3 years ago

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Mars2501 [29]

Answer:

The answers are located in each of the explanations showed below

Explanation:

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where:

F = force [N]

l = length [m]

σ = Surface Tension [N/m]

(ii) Frequency is the number of repetitions per unit of time of any periodic event.

f = 1/T [1/s] or [s^-1] or [Hz]

where:

T = period [s] or [seconds]

f = frecuency [Hz] or [hertz]

(iii) Each of the units will be shown for each variable

v = velocity [m/s]

a = accelertion [m/s^2]

s = displacement [m]

$[\frac{m}{s} ]^{2} =[\frac{m}{s} ]^{2} + 2* [\frac{m}{s^{2} } ]*[m]\\$

$[\frac{m^2}{s^2} ] =[\frac{m^2}{s^2} ] + [\frac{m^{2} }{s^{2} } ]$

$[\frac{m^2}{s^2} ]$

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$v=1.5*(4)+5\\v=11[m/s]$

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$v = \frac{x-x_{0} }{t-t_{0} } \\$

$x_{0}=0.75(2)^{2}+5(2)+1 \\ x_{0}=14[m]\\x=0.75(7)^{2}+5(7)+1\\x=72.75[m]\\t = 7 [s]t0= 2[s]Now replacing:[tex]v_{prom} = \frac{72.75-14}{7-2} \\v_{prom} = 11.75 [m/s]$

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Therefore:

P1 = pressure at point 1.

P2 = pressure at point 2.

P1 = F1/A1

P2= F2/A2

$\frac{F_{1} }{A_{1} }=\frac{F_{2}}{A_{2} } \\F_{1}=A_{1}*(\frac{F_{2}}{A_{2} })$

b) One of the applications of the surface tension is the <u>capillarity</u> this is a property of liquids that depends on their surface tension (which, in turn, depends on the cohesion or intermolecular force of the liquid), which gives them the ability to climb or descend through a capillary tube.

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The mosquitoes that can sit on the water.

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sweet-ann [11.9K]

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3 years ago