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3 years ago

If element X has 12 protons, how many electrons does it have?

Mathematics

1 answer:

andre [41]3 years ago

6 0

If an element has x protons, it almost always has x electrons at ground state. Thus, your answer is 12.

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Two equations are given below:

jeka94

Siince 2nd equation is already equal a, subsitute b-2 for a in the other equation

b-2-3b=28
-2-2b=28
add 2 to both sides
-2b=30
divide both sides by -2
b=-15
sub back
a=b-2
a=-15-2
a=-17

(a,b)
(-17,-15)

3rd choice

4 0

2 years ago

Help me plsss 16,17,18 ;((((

ArbitrLikvidat [17]

Answer:

16. -197 < -110

17. 167 > -65

18. Mercury, Earth, Mars, Jupiter, Uranus, Neptune

Step-by-step explanation:

It can help to plot these temperatures on a number line. The ones farther to the left are less than ones to their right.

16. -197 < -110 . . . Uranus < Jupiter

17. 167 > -65 . . . Mercury > Mars

18. Reading the graph from right to left, the order greatest to least is ...

Mercury, Earth, Mars, Jupiter, Uranus, Neptune

Not surprisingly, this is the order of these planets outward from the sun.

6 0

3 years ago

Jason is 6 feet tall, and at 6 pm, his shadow was 15 feet long. At the same time, a tree next to Jason had a 25-foot shadow. Wha

IRISSAK [1]

Answer:

Step-by-step explanation:

set up a ratio problem

6 feet/15 long shad= x/25 shad

15x = 150

x = 10

3 0

3 years ago

Expression with the same value

umka2103 [35]

No offense but the question dosen't make sense

3 0

3 years ago

Justify whether the solution makes sense.

Zigmanuir [339]

Answer:

They are identical triangles.

Step-by-step explanation:

Angles in a triangle add up to 180 degrees.

The triangle with 39 and 90 has a missing angle of 51 degrees, and the triangle with 51 and 90 vice versa.

5 0

2 years ago

Read 2 more answers