DadeO999 DadeO999

15-12-2020
Chemistry

contestada

A single atom of an element has 21 neutrons, 20 electrons, and 20 protons, which elementis it?

Respuesta :

abigailgillman94 abigailgillman94

15-12-2020

Answer:

Calcium

Explanation:

The number of protons is the atomic number of the element. Number 20 on the periodic table is Calcium.

Answer Link

Otras preguntas

Can anyone help me with this please!!

**PLEASE HELP** Which system of government offers a greater separation of powers between executive and legislative branches? In a ___ (unitary, presidenti

Emigration has occurred in an ecosystem when individual organisms____. A. Move into the ecosystem B. Are born healthy C. Die of disease D. Leave the ecosystem

Differences in courtship or other behaviors prevent mating

In ______________ the head of state is different then most democracies because the head of state holds the most power. A. Russia B. Germany C. United Kingdom Pl

It's been a really hot summer. Does that mean the climate is changing? options: Yes, an unusually hot summer indicates global warming. No, climate change involv

The house can limit the amount of time to debate a bill

Give an example of a compound machine. Explain how at least two simple machines are part of the complex machine. Thank you !!

Oceangoing vessels used to dump sewage into the ocean. Which human lifestyle factors led to this situation? select the three correct responses.A. People enjoy c

HELP PLEASEEEE !!! First correct answer gets brainliest