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3 years ago

Which statement OR statements are true about groups on the periodic table?

Biology

2 answers:

11Alexandr11 [23.1K]3 years ago

8 0

Answer: A,C,D

Explanation:

Element in the same group shared similar chemical behaviour and resemble each other because of the same number of valency electron they have. Example group one element have a valence electron of one.

Because of the same Valency electron they react in a similar way.

Example Group 1 have one valence electron and therefore Ionize readily to form positive electron this occur when they donate their valence electron leading to the formation of electrovalent compounds this is applicable for all group one element. Hence,

Elements in the same group have similar properties and react the same

Also, because element in the same group share the same property in chemical behaviour they are said to belong to one family.

Element in the same group do not have the same energy level because their electron tends to increases down the group and therefore energy level increases and not constant for all elements.

Shalnov [3]3 years ago

6 0

Answer: Option A,C and D.

Explanation:

Groups on the periodic table refer to elements on the same column on the table.

Elements on the groups in periodic tables have similar physical and chemical properties and similar electronic configurations.

Elements in the same group on the periodic table have the same number of electrons at their outer shell.

Groups are also called families. Because they have the same chemical properties.

The major groups on the periodic table are;

Group 1: Alkali metals like Sodium, calcium.

Group 2. Alkali Earth metals.

Group 11: coinage metals.

Group 15: Pnictogens.

Group 16: Chalcogens.

Group: 17: halogens like chlorine, flourine. Bromine.

Group 18: Noble gases like Argon, neon

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Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I

11111nata11111 [884]

Complete question:

Question: Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I of meiosis.

a) Sister chromatids are genetically similar, except where mutations may have occurred during DNA replication. Nonsister chromatids are genetically dissimilar.

b. Sister chromatids are genetically identical, except where mutations may have occurred during DNA replication. Nonsister chromatids are genetically similar if on homologous chromosomes and genetically dissimilar if on nonhomologous chromosomes.

c. Sister chromatids are genetically identical, except where mutations may have occurred during DNA replication. Nonsister chromatids are genetically similar.

d. Sister chromatids are not genetically similar, except where mutations may have occured during DNA replication. Nonsister chromatids are genetically similar if on homologous chromosomes and genetically dissimilar if on nonhomologous chromosomes.

Answer:

Explanation:

A chromosome has two chromatids after the S phase of the cell cycle. The replicated DNA molecules are accommodated in the sister chromatids. Therefore, two chromatids of a chromosome carry the identical DNA molecule and are genetically identical to each other. The sister chromatids may carry different genes if one or more mutation occurs in their DNA.

Two chromatids of two different chromosomes are called non-sister chromatids. Homologous chromosomes are the chromosomes that are similar in morphology and genetic constitution. Therefore, two chromatids of a homologous pair are also non-sister chromatids but have genetically identical sequences. For example, the two non-sister chromatids of the pair of chromosome 21 in humans carry the alleles for the same genes.

However, the non-sister chromatids that belong to nonhomologous chromosomes carry different genes and are not genetically identical.

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Answer:

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Answer:

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Explanation:

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