Ela tem bom coração.

Because coração is a masculine noun in Portuguese: o coração.

Adjectives usually agree with the noun they describe, so:

• bom coração = masculine
• boa pessoa = feminine

Even though ela refers to a woman, bom is describing coração, not ela.

In Portuguese, especially in set expressions, you can often leave out the article where English would naturally include one.

So both of these are possible:

• Ela tem bom coração.
• Ela tem um bom coração.

The version without um sounds a little more idiomatic and general, like saying she is kind-hearted by nature. The version with um is also correct and may sound slightly more concrete or emphatic.

Yes. Portuguese uses ter in the same figurative way here.

• Ela tem bom coração. = She has a good heart.

It means she is kind, generous, or compassionate. This is a normal and natural expression in Portuguese.

Yes, pretty much. Ter bom coração is a very common expression meaning to be kind-hearted.

You may also hear similar expressions like:

• Ele tem um bom coração.
• Ela é uma pessoa de bom coração.

So bom coração is a familiar and natural phrase in Portuguese.

Yes, but it sounds less natural in this context.

Portuguese often prefers the adjective before the noun in expressions like this:

• more natural: um bom coração
• less common here: um coração bom

Grammatically, um coração bom is possible, but bom coração is the normal phrasing for this idea.

Tem is the third-person singular form of the verb ter in the present tense.

Present tense of ter:

• eu tenho
• você / ele / ela tem
• nós temos
• vocês / eles / elas têm

So:

• Ela tem = she has

Usually, not by itself in a neutral sentence.

Portuguese often allows omitted subject pronouns, but with tem, the form could mean:

• ele tem
• ela tem
• você tem

So without context, it is ambiguous.

If the subject is already clear from the conversation, native speakers may omit it. But as a standalone sentence, Ela tem bom coração is clearer.

No. In this sentence, coração is figurative.

It refers to someone's character, feelings, or kindness, not the organ itself.

So here bom coração means something like:

• kind nature
• kind heart
• generous spirit

Coração is pronounced approximately like ko-ra-SOWN, with a nasal sound at the end.

A few helpful points:

• ç sounds like s
• the stress is on the last syllable: ção
• ão is a very common Portuguese ending and has a nasal sound that English does not really have

So coração is not pronounced like a plain English ow sound. The ending is nasal.

The plural is corações.

So:

• singular: coração
• plural: corações

Example:

• Eles têm bons corações. = They have good hearts.

Notice the changes:

• tem → têm
• bom → bons
• coração → corações

It must be bom, not bem.

• bom is an adjective = good
• bem is usually an adverb = well

Since bom describes the noun coração, you need the adjective:

• bom coração = good heart

Bem coração is not correct.

Yes. That is also correct and natural.

You may hear:

• Ela tem bom coração.
• Ela é de bom coração.

Both mean that she is kind-hearted. The first literally uses to have, and the second is more like she is of good heart. In everyday use, both are idiomatic and understandable.

It is neutral and very natural.

You can use it in:

• everyday conversation
• writing
• descriptions of someone's personality

It is neither slangy nor especially formal. It is a standard, common way to describe someone as kind-hearted.