Mathematics High School

Use the portion of the periodic table shown below to answer the questions.

A portion of the first three columns of the periodic table is shown. Column one from top to bottom reads 11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. Column two reads 12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. Column three reads 21 scandium 44.956 and 39 yttrium 88.906.

Part 1: Name two elements that have the same properties as magnesium (Mg). (4 points)
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences. (6 points)

Answers

Answer 1

Part 1:

Calcium(Ca) And Strontium (Sr)

Part 2:

Protons: 19

Electrons: 19

(both are the same)

Neutrons:20

Subtract 19 From 39 And Get 20

If You Use This Pls Put it in your own words

Also Sorry if I'm late!

Related Questions

Resuelve el siguiente polinomio aritmético: 200 – (74 + (720/9) + 44 + 16 x (4 + 6 – 8 x 2) - (42/2) + 70) – 2

Answers

Answer:

47

Step-by-step explanation:

PEMDAS - Parenthesis, Exponential, Multiplication, Addition, Subtraction

200 – (74 + (720/9) + 44 + 16 x (4 + 6 – 8 x 2) - (42/2) + 70) – 2

200 – (74 + 80 + 44 + 16 x (-6) - 21 + 70) – 2

200 – (74 + 80 + 44 - 96 - 21 + 70) – 2

200 – 151 – 2

47

Free Cookie or brainliest

Answers

Answer: point C

Step-by-step explanation: the square root of 68 is 8.246and it keeps going with other digits

Answer:

C. Point C,

Step-by-step explanation:

The squre root of 68 is 8.24 and most likely to be 8 so letter C.

Thank you!!

please help me !!! i'll give brainliest

Answers

Answer:

a. root (x^2 + 64)

Step-by-step explanation:

(8^2 + x^2) = y^2

If you root both sides,

y = root (x^2 + 64)

I = $75, P = $500, t = 15 months i need help :((

Answers

Answer:

Use the simple interest formula

Solve simple interest applications

Be prepared!

Before you get started, take this readiness quiz.

Solve 0.6y = 45. If you missed this problem, review Example 5.7.4.

Solve  1.45  = 4.6. If you missed this problem, review Example 5.7.5.

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

what is T/8 = -4 solve for T​

Answers

Answer:

The answer is -32

Step-by-step explanation:

Multiply both sides by 8 to cancel 8 as the denominator and you have T = -32


Question 5. What is the value of E? How do you know?

Answers

Answer:

74 degrees because E is alternate interior angles with the other 74 degrees angle.

Step-by-step explanation:

Choose values for horizontal and vertical translation to move triangle ABC. Use the tool to translate the figure in both the x and y directions. y Horizontal Translation 4 C 2 Vertical Translation Which statements are true about the image? The triangle flipped upside down. The sides stayed the same length. The angles stayed the same size. The triangle completed a quarter turn. -2. Reset -2 A B -48.​

Answers

Answer:The sides stayed the same length

The angles stayed the same size

Step-by-step explanation:

Identify the translations.

The orange triangle, A, is the pre-image.

The pre-image moved

✔ 5

units horizontally to form the purple triangle, B.

The pre-image moved

✔ 4

units vertically to form the green triangle, C.

Can someone answer my question please

Answers

Answer:

do you know how to calculate c

Step-by-step explanation:

what is the discount price for 52% of 210?

10,920

1,092

158

109.20​

Answers

Answer:

the answer is 109.20

what does 4m^2 +5m if m=-2 equal?

Answers

Answer:

-26

Step-by-step explanation:

tell me if im right and please brainliest

convert 5000 mm = ____ cm​

Answers

Answer:

it's 500 cm

HOPE THIS HELPS

Step-by-step explanation:

Answer:

500 cm

Step-by-step explanation:

i did the math

A lorry drives for 4 hours at a speed of 45 mph. Calculate how far it travles

Answers

Answer:

180 miles

Step-by-step explanation:

Distance = speed x time

45 x 4 =180miles

distance = 180
distance = speed x time
distance = 4 x 45

Heather bought a CD on sale for $11
and a book for $14. The sales tax rate
is 5%. How much tax did she pay for
both items?

Answers

Answer:

Heather paid $26.25 for both items

PLEASE HELP THISIS GETTING TIMED

Answers

Answer:

30/34 =

Step-by-step explanation:

For your parent's 25th wedding anniversary, you want to restore and enlarge their
engagement picture. The photo was originally 3 in-long by 5 in high. What ratio should
you tell the photo restoration shop so that they create an enlargement that is 45 in
long by 75 in wide?

Answers

Answer:

1/15

Step-by-step explanation:

Original length 3 in; New Length= 45

Original width 5 ;new width= 75

So 3/45

=5/75

=1/15

Hope it helps!

87875696 X 785


plz help.

Answers

Answer:

68982421360

Step-by-step explanation:

Answer:

68982421360

Step-by-step explanation:

just do long multiplication

Round : 9198.10666667
to the nearest hundredth

Answers

Answer:

9198.17

Step-by-step explanation:

Answer:

9198.11

Step-by-step explanation:

;) the zero becomes a 1 since next number 6 (above 5)

I need help with this important question it's for a important grade​

Answers

Answer:

50

Step-by-step explanation:

29+42+61+?=180

add (29,42,61) that gives you 132

now 132-180=48

48 rounded to the nearest tenth is 50 sooo....

X= 50

when the short hand of a clock moves through 12 o clock to 3 o'clock what angle is formed

Answers

Answer:

90* angle or also called a right angle.

Step-by-step explanation:

pls help i’ll love u forever

Answers

The answer would be 10.2418

Solve the trigonometric equation for all values: -7 < or equal to x < 7 Question: Cot 1/2x-1=0

Answers

Answer:

x =90

Step-by-step explanation:

Cot 1/2x-1=0

Add 1 to both sides

Cot 1/2x = 0+1

Cot 1/2x = 1

1/tan1/2x = 1

Tan 1/2x = 1

1/2x = arctan1

1/2x =45

x = 45×2

x = 90

Hence the value of x is 90

What is the area of the regular pentagon below?

Answers

Answer:
42 yd (hope it helps)

PLS HELP ME I WILL MARK!!!!~ don't need to show work

Answers

I’m not so sure, but I think it might be:
f(x)=x-1
Sorry if wrong

Answer:

The answer is:  2x+1f(x)=

Step-by-step explanation:

The standard form for linear equations in two variables is Ax+By=C. For example, 2x+3y=5 is a linear equation in standard form. When an equation is given in this form, it's pretty easy to find both intercepts (x and y). This form is also very useful when solving systems of two linear equations.

Evaluate the expression when a = 10, b = 9, and c =4

a+9c

Answers

Answer

i think the answer is 46 because

10+9x4=46

Please help im desperate :)​

Answers

Answer:

c

Step-by-step explanation:

because it is going in a round shape

How many solutions does the following equation have?
3(x+5)=-4x+83(x+5)=−4x+8

Answers

i think it would have one

Answer:

It has one solution

Step-by-step explanation:

What is the area of this parallelogram?


4.9 cm²

12.25 cm²

17.15 cm²

24.01 cm²

PLS HELP!! I WILL GIVE BRAINLYIST

Answers

Answer:

The answer is 17.15! Brainliest pls :D

Answer:

C, 17.15

Step-by-step explanation:

4.9*3.5 = 17.15

pls help been waiitng for 2 hours now..

Answers

Answer:

(5,3)

Step-by-step explanation:

you would move 3 to the right and 2 down

Find the value of x if b=8 and a=6

Answers

Answer:

x = 10

Step-by-step explanation:

Using the Pythagorean theorem:

8² + 6² = x²

64 + 36 = x²

x² = 100

x = 10

PLEASE ANSWER HURRY!!

Answers

Answer:

The answer is B (4,10).

Step-by-step explanation:

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