Atomic structure

Front

Which part of the diagram represents the proton?

Back

c

Answer explanation

En el diagrama, la parte que representa el protón es la opción c. Los protones son partículas subatómicas con carga positiva, y en muchos diagramas atómicos, se suelen identificar claramente con una letra o símbolo específico.

Front

What is the atomic number of Boron?

Back

5

Answer explanation

The atomic number of an element is the number of protons in its nucleus. Boron has 5 protons, which gives it an atomic number of 5. Therefore, the correct answer is 5.

Front

What is the atomic mass of Boron?

Back

11

Answer explanation

The atomic mass of Boron is approximately 11 atomic mass units (amu). This value reflects the weighted average of the isotopes of Boron, primarily Boron-11, making 11 the correct answer.

Front

How many electrons does Sodium have?

Back

11

Answer explanation

Sodium (Na) has an atomic number of 11, which means it has 11 protons and, in a neutral atom, the same number of electrons. Therefore, the correct answer is 11.

Front

How many neutrons does Fluorine have?

Back

10

Answer explanation

Fluorine has an atomic number of 9, which means it has 9 protons. The atomic mass of Fluorine is approximately 19. To find the number of neutrons, subtract the number of protons from the atomic mass: 19 - 9 = 10. Thus, Fluorine has 10 neutrons.

Front

How many protons does Boron have?

Back

5

Answer explanation

Boron has an atomic number of 5, which means it has 5 protons in its nucleus. This is the defining characteristic of the element Boron.

Front

Subatomic particles that have a negative charge

Back

electrons

Answer explanation

Electrons are subatomic particles with a negative charge, while protons have a positive charge, neutrons are neutral, and quarks can have various charges. Therefore, the correct answer is electrons.

Front

Which particles are located in the nucleus?

Back

Protons & Neutrons

Answer explanation

The nucleus of an atom contains protons and neutrons. Protons are positively charged, while neutrons have no charge. Electrons, which are negatively charged, orbit the nucleus and are not located within it.

Front

Which sub-atomic particles were determined to have charges?

Back

Protons & Electrons

Answer explanation

Protons have a positive charge, while electrons have a negative charge. Neutrons are neutral and do not have a charge. Therefore, the correct answer is Protons & Electrons.

Front

An atom has 25 protons and 30 neutrons. How many electrons are needed to make the atom neutral?

Back

25

Answer explanation

An atom is neutral when the number of protons equals the number of electrons. Since this atom has 25 protons, it needs 25 electrons to balance the positive charge, making it neutral.