21 neutrons, 20 electrons, 20 protons

Ca

Explanation:atoms are made of 3 types of sub atomic particles; protons , neutrons and electrons

electrons are negatively charged, protons are positively charged and neutrons are neutrally charged.

atoms of elements are neutral with an equal number of protons and electrons.

Atomic number is the number of protons. atomic number is characteristic for the element.

to identify an element we have to know the number of protons. the given atom has 20 protons therefore the atomic number is 20. we can check the periodic table to find the element with the atomic number of 20

the element with an atomic number of 20 is Ca.

answer is Ca

sure im new too!

explanation:

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph