madrae02 madrae02

09-01-2019
Chemistry

contestada

The electron configuration for an atom is 1s 2s 2p2. How many electrons does the atom have?
2
4
5
6

Respuesta :

09-01-2019

Answer:

Four

Step-by-step explanation:

The superscripts in an electron configuration tell us how many electrons are in a subshell.

If the electron configuration is 1s¹ 2s¹2p², the total number of electrons is

1 + 1 + 2 = 4

The atom contains four electrons.

Note: this atom is in an excited state, because the 1s and 2s subshells can each hold one more electron.

Answer Link

Otras preguntas

4. Try It #4 Write the point-slope form of an equation of a line that passes through the points (-1,3) and (0,0). Then rewrite it in the slope-intercept form.

If $1 in U.S. Dollars is equivalent to 0.1273 Chinese yuan, convert 13,000 to yuan.

Construct a square matrix A of order 3

Hox genes Group of answer choices appear to function in similar ways across diverse groups of organisms. function only in fruit flies. control which amino acids

Which best describes the relationship between the line that passes through the points (-9, -7) and (-12, -2) and the line that passes through the points (1, 9)

Determining figurative and connotative meanings: mastery test

In the following exercises, multiply the binomials. Use any method. 243. (y − 6)(y − 2)

In recent times, we now know tectonic plates move and cause continents to separate and collide over many years. Given this fact, do you think governments should

The kidney was one of the first organs to be successfully transplanted because it is so encapsulated and has limited vessels feeding into or out of it. How many

In the following exercises, multiply the binomials. Use any method. 255. (a + b)(2a + 3b)